1. The problem asks: How many players did not win any matches last summer? 2. From the dot plot data, the number of players who won 0 matches is given as 4. 3. Since the question is directly about players with 0 matches won, the answer is simply the count at 0 matches. 4. Therefore, the number of players who did not win any matches last summer is 4. Final answer: **4 players** did not win any matches last summer.