was thinking the scores looked competitive, probably belongs at 4.0
the cynical side of me, saw the 5-7, 6-1 score, and thought he was "managing" scores
OP, check out tennisrecord, or tls (not exact, but a good guess)... if the guys he's beating are "high 4.0" also, then probably a good guess he will be dq'd... but the scores alone aren't enough... eg. the last score where he won 1,2... against a very high 4.0 (high chance of dq)... but he could have also played a sacrafice very low 4.0... (score is expected)
either way, if he's also playing 3.5 league, he's definitely getting dq'd from there