diff --git a/pages/create.js b/pages/create.js
index 2fdc781..b49123f 100644
--- a/pages/create.js
+++ b/pages/create.js
@@ -163,14 +163,17 @@ class CreateTournamentForm extends React.Component {
 
     handleGroupSizeInput(input) {
         const newSize = input.target.value;
-        if (newSize !== undefined && newSize > 2) {
-            if (newSize <= this.state.groupAdvance) {
-                this.setState({
-                    groupSize: newSize, groupAdvance: newSize - 1
-                });
-            } else {
-                this.setState({groupSize: newSize});
-            }
+        
+        if (newSize === undefined || newSize < 2) {
+            return;
+        }
+
+        if (newSize <= this.state.groupAdvance) {
+            this.setState({
+                groupSize: newSize, groupAdvance: newSize - 1
+            });
+        } else {
+            this.setState({groupSize: newSize});
         }
     }