21.   He lost his serve three times in the final set and said his hamstring was a factor in the defeat.

22.   He says his hamstring is fine and manager Joe Torre hopes to confirm that diagnosis.

23.   He told the team Monday that his hamstrings were too sore for him to play.

24.   If your hamstrings are too weak, they may not protect the ACL.

25.   Sampras admitted his right hamstring was sore Saturday and his right arm felt heavy.

26.   Tests performed Tuesday found that the hamstring is still weak.