There are $n$ $(n \ge 3)$ players in a table tennis tournament, in which any two players have a match. Player $A$ is called not out-performed by player $B$, if at least one of player $A$'s losers is not a $B$'s loser.

Determine, with proof, all possible values of $n$, such that the following case could happen: after finishing all the matches, every player is not out-performed by any other player.
To solve this problem, we need to determine the values of \( n \) such that after all matches in a table tennis tournament, every player is not out-performed by any other player. This means that for any two players \( A \) and \( B \), there exists at least one player \( C \) such that \( A \) beats \( C \) but \( B \) does not beat \( C \).

1. **Understanding the Problem:**
   - We need to find a directed graph where each edge is part of a directed quadrilateral.
   - This implies that for any two players \( A \) and \( B \), there is a player \( C \) such that \( A \) beats \( C \) but \( B \) does not beat \( C \).

2. **Base Case for \( n = 5 \):**
   - Consider \( K_5 \), the complete graph on 5 vertices.
   - Arrange the vertices in a pentagon with a "star" shape in the center.
   - Make the pentagon and star directed cycles both going clockwise.
   - This ensures that each edge is part of a directed quadrilateral.

3. **Inductive Step:**
   - Assume the graph \( G \) with \( k \) vertices satisfies the condition.
   - Introduce a new vertex \( v_{k+1} \) and create the new graph \( G' \) as follows:
     - For any vertex \( v \in G \), there is a directed quadrilateral through \( v \), say \( v \to w \to x \to y \to v \).
     - If \( x \) and \( v_{k+1} \) are not already joined by an edge, create edges \((x, v_{k+1})\) and \((v_{k+1}, v)\).
     - If \((x, v_{k+1}) \in E(G')\), then \((v_{k+1}, v) \in E(G')\).
     - If \((v_{k+1}, x) \in E(G')\), then \((v, v_{k+1}) \in E(G')\).
   - Eventually, \( v_{k+1} \) is connected to all vertices, and we have a new graph with the desired property.

4. **Verification for \( n = 3 \) and \( n = 4 \):**
   - For \( n = 3 \), we need at least 4 vertices to form a directed quadrilateral.
   - For \( n = 4 \), we need at least another vertex to form a directed quadrilateral with edge \((v_1, v_3)\) or \((v_3, v_1)\) (whichever way it is directed).

Therefore, the smallest \( n \) for which the condition holds is \( n = 5 \).

The final answer is \( \boxed{ n \geq 5 } \).