[Walker: It's uncomfortable to hear that we are playing mediocre and we need to do better] The Green Army lost to the Heat in G4 and trailed 1-3 in total. Walker scored 20 points, 4 rebounds and 5 assists in this game. When asked why the Celtics did not perform well, he said: "I can't explain this problem. It is really uncomfortable to hear people say that we played well. It's that simple, we need to do better."