diff --git a/src/genetic_algorithm.py b/src/genetic_algorithm.py
index 9cf519c..8dbd6d4 100644
--- a/src/genetic_algorithm.py
+++ b/src/genetic_algorithm.py
@@ -115,6 +115,11 @@ def crossover(mode, parents, m):
     return position_crossover(parents, m)
 
 
+def element_in_dataframe(solution, element):
+    duplicates = solution.query(f"point == {element}")
+    return not duplicates.empty
+
+
 def mutate(solution, n, probability=0.001):
     if random() > probability:
         return solution
@@ -127,9 +132,10 @@ def mutate(solution, n, probability=0.001):
     return solution
 
 
-def element_in_dataframe(solution, element):
-    duplicates = solution.query(f"point == {element}")
-    return not duplicates.empty
+def tournament_selection(solution):
+    individuals = solution.sample(n=2)
+    best_index = solution["distance"].astype(float).idxmax()
+    return individuals.iloc[best_index]
 
 
 def replace_worst_element(previous, n, data):