diff --git a/README.md b/README.md
index 7e78bd6..af24668 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,9 @@
 
 The [TrueOG Network](https://trueog.net) fork of [Duels](https://github.com/Realizedd/Duels) - a duel plugin for Spigot. <a href="https://www.spigotmc.org/resources/duels.20171/">Spigot Project Page</a>
 
-Includes the following proposed changes that have yet to be merged into Duels upstream:
+Changes from Duels:
 
+- Only start Duels from one world, configurable in config.yml by @NotAlexNoyle
 - Inventory loss bug fixes by @szumielxd
 - Essentials API NPE fix by @skbeh
 - Update deprecated pickup API by @NotAlexNoyle
diff --git a/duels-plugin/src/main/java/me/realized/duels/command/commands/duel/DuelCommand.java b/duels-plugin/src/main/java/me/realized/duels/command/commands/duel/DuelCommand.java
index 64c6bd0..4c62397 100644
--- a/duels-plugin/src/main/java/me/realized/duels/command/commands/duel/DuelCommand.java
+++ b/duels-plugin/src/main/java/me/realized/duels/command/commands/duel/DuelCommand.java
@@ -82,7 +82,7 @@ public class DuelCommand extends BaseCommand {
             return true;
         }
 
-        if (config.getBlacklistedWorlds().contains(player.getWorld().getName())) {
+        if (!config.isDuelingWorld(player) || config.getBlacklistedWorlds().contains(player.getWorld().getName())) {
             lang.sendMessage(sender, "ERROR.duel.in-blacklisted-world");
             return true;
         }
diff --git a/duels-plugin/src/main/java/me/realized/duels/config/Config.java b/duels-plugin/src/main/java/me/realized/duels/config/Config.java
index 44e300d..b894b3f 100644
--- a/duels-plugin/src/main/java/me/realized/duels/config/Config.java
+++ b/duels-plugin/src/main/java/me/realized/duels/config/Config.java
@@ -122,6 +122,8 @@ public class Config extends AbstractConfiguration<DuelsPlugin> {
     @Getter
     private boolean cancelIfMoved;
     @Getter
+    private String enabledWorld;
+    @Getter
     private List<String> blacklistedWorlds;
     @Getter
     private boolean teleportToLastLocation;
@@ -317,6 +319,10 @@ public class Config extends AbstractConfiguration<DuelsPlugin> {
         preventTpToMatchPlayers = configuration.getBoolean("duel.prevent-teleport-to-match-players", true);
         forceAllowCombat = configuration.getBoolean("duel.force-allow-combat", true);
         cancelIfMoved = configuration.getBoolean("duel.cancel-if-moved", false);
+        final String configuredEnabledWorld = configuration.getString("duel.enabled-world", "world");
+        enabledWorld = configuredEnabledWorld != null && !configuredEnabledWorld.trim().isEmpty()
+            ? configuredEnabledWorld.trim()
+            : "world";
         blacklistedWorlds = configuration.getStringList("duel.blacklisted-worlds");
         teleportToLastLocation = configuration.getBoolean("duel.teleport-to-last-location", false);
         teleportDelay = configuration.getInt("duel.teleport-delay", 5);
@@ -414,6 +420,11 @@ public class Config extends AbstractConfiguration<DuelsPlugin> {
         return sounds.keySet();
     }
 
+    public boolean isDuelingWorld(final Player player) {
+        return player != null && player.getWorld() != null
+            && enabledWorld.equalsIgnoreCase(player.getWorld().getName());
+    }
+
     public class MessageSound {
 
         @Getter
diff --git a/duels-plugin/src/main/java/me/realized/duels/duel/DuelManager.java b/duels-plugin/src/main/java/me/realized/duels/duel/DuelManager.java
index 6e82014..4d0fdf5 100644
--- a/duels-plugin/src/main/java/me/realized/duels/duel/DuelManager.java
+++ b/duels-plugin/src/main/java/me/realized/duels/duel/DuelManager.java
@@ -376,7 +376,7 @@ public class DuelManager implements Loadable {
     }
 
     private boolean isBlacklistedWorld(final Player player) {
-        return config.getBlacklistedWorlds().contains(player.getWorld().getName());
+        return !config.isDuelingWorld(player) || config.getBlacklistedWorlds().contains(player.getWorld().getName());
     }
 
     private boolean isTagged(final Player player) {
@@ -712,4 +712,4 @@ public class DuelManager implements Loadable {
             lang.sendMessage(player, "DUEL.prevent.inventory-open");
         }
     }
-}
\ No newline at end of file
+}
diff --git a/duels-plugin/src/main/java/me/realized/duels/player/PlayerInfoManager.java b/duels-plugin/src/main/java/me/realized/duels/player/PlayerInfoManager.java
index 61e7958..9c876f4 100644
--- a/duels-plugin/src/main/java/me/realized/duels/player/PlayerInfoManager.java
+++ b/duels-plugin/src/main/java/me/realized/duels/player/PlayerInfoManager.java
@@ -97,11 +97,13 @@ public class PlayerInfoManager implements Loadable {
             }
         }
 
-        // If lobby is not found or invalid, use the default world's spawn location for lobby.
-        if (lobby == null || lobby.getWorld() == null) {
-            final World world = Bukkit.getWorlds().get(0);
-            this.lobby = world.getSpawnLocation();
-            Log.warn(this, String.format(ERROR_LOBBY_DEFAULT, world.getName()));
+        // If lobby is not found or points at a disabled/unloaded world, use the
+        // configured dueling world's spawn location for lobby.
+        if (!isEnabledWorld(lobby)) {
+            this.lobby = getFallbackLocation();
+            final World world = this.lobby != null ? this.lobby.getWorld() : null;
+            Log.warn(this,
+                String.format(ERROR_LOBBY_DEFAULT, world != null ? world.getName() : config.getEnabledWorld()));
         }
     }
 
@@ -112,7 +114,7 @@ public class PlayerInfoManager implements Loadable {
 
             if (info != null) {
                 player.spigot().respawn();
-                teleport.tryTeleport(player, info.getLocation());
+                teleport.tryTeleport(player, safeReturnLocation(info.getLocation()));
                 PlayerUtil.reset(player);
                 info.restore(player);
             }
@@ -143,6 +145,10 @@ public class PlayerInfoManager implements Loadable {
      * @return true if setting lobby was successful, false otherwise
      */
     public boolean setLobby(final Player player) {
+        if (!config.isDuelingWorld(player)) {
+            return false;
+        }
+
         final Location lobby = player.getLocation().clone();
 
         try (final Writer writer = new OutputStreamWriter(new FileOutputStream(lobbyFile), Charsets.UTF_8)) {
@@ -176,7 +182,9 @@ public class PlayerInfoManager implements Loadable {
         final PlayerInfo info = new PlayerInfo(player, excludeInventory);
 
         if (!config.isTeleportToLastLocation()) {
-            info.setLocation(lobby.clone());
+            info.setLocation(safeReturnLocation(lobby));
+        } else if (!isEnabledWorld(info.getLocation())) {
+            info.setLocation(safeReturnLocation(info.getLocation()));
         }
 
         cache.put(player.getUniqueId(), info);
@@ -201,6 +209,30 @@ public class PlayerInfoManager implements Loadable {
         return cache.remove(player.getUniqueId());
     }
 
+    private boolean isEnabledWorld(final Location location) {
+        return location != null && location.getWorld() != null
+            && config.getEnabledWorld().equalsIgnoreCase(location.getWorld().getName());
+    }
+
+    private Location getFallbackLocation() {
+        World world = Bukkit.getWorld(config.getEnabledWorld());
+
+        if (world == null && !Bukkit.getWorlds().isEmpty()) {
+            world = Bukkit.getWorlds().get(0);
+        }
+
+        return world != null ? world.getSpawnLocation() : null;
+    }
+
+    private Location safeReturnLocation(final Location location) {
+        if (isEnabledWorld(location)) {
+            return location.clone();
+        }
+
+        final Location fallback = getFallbackLocation();
+        return fallback != null ? fallback.clone() : null;
+    }
+
     private class PlayerInfoListener implements Listener {
 
         // Handles case of some players causing respawn to skip somehow.
@@ -218,7 +250,7 @@ public class PlayerInfoManager implements Loadable {
                 return;
             }
 
-            teleport.tryTeleport(player, info.getLocation());
+            teleport.tryTeleport(player, safeReturnLocation(info.getLocation()));
             info.restore(player);
         }
 
@@ -231,7 +263,7 @@ public class PlayerInfoManager implements Loadable {
                 return;
             }
 
-            event.setRespawnLocation(info.getLocation());
+            event.setRespawnLocation(safeReturnLocation(info.getLocation()));
 
             if (essentials != null) {
                 essentials.setBackLocation(player, event.getRespawnLocation());
diff --git a/duels-plugin/src/main/java/me/realized/duels/queue/QueueManager.java b/duels-plugin/src/main/java/me/realized/duels/queue/QueueManager.java
index 37fd751..de52b94 100644
--- a/duels-plugin/src/main/java/me/realized/duels/queue/QueueManager.java
+++ b/duels-plugin/src/main/java/me/realized/duels/queue/QueueManager.java
@@ -361,6 +361,11 @@ public class QueueManager implements Loadable, DQueueManager, Listener {
             return false;
         }
 
+        if (!config.isDuelingWorld(player) || config.getBlacklistedWorlds().contains(player.getWorld().getName())) {
+            lang.sendMessage(player, "ERROR.duel.in-blacklisted-world");
+            return false;
+        }
+
         if ((combatTagPlus != null && combatTagPlus.isTagged(player)) || (pvpManager != null && pvpManager.isTagged(player))) {
             lang.sendMessage(player, "ERROR.duel.is-tagged");
             return false;
diff --git a/duels-plugin/src/main/resources/config.yml b/duels-plugin/src/main/resources/config.yml
index 080f8af..279317d 100644
--- a/duels-plugin/src/main/resources/config.yml
+++ b/duels-plugin/src/main/resources/config.yml
@@ -231,6 +231,10 @@ duel:
   # default: false
   cancel-if-moved: false
 
+  # Only allow duels to be started from this world.
+  # default: world
+  enabled-world: 'world'
+
   # List of worlds to disable dueling.
   blacklisted-worlds:
     - 'world_name_here'
@@ -603,4 +607,4 @@ sounds:
     pitch: 1.9
     volume: 1.0
     trigger-messages:
-    - '&7Now in a match against &f%opponent%&7(&a%opponent_rating%&7) with kit &3%kit% &7in arena &e%arena%&7.'
\ No newline at end of file
+    - '&7Now in a match against &f%opponent%&7(&a%opponent_rating%&7) with kit &3%kit% &7in arena &e%arena%&7.'