Qualifier Michael Russell took advantage of the ailing Mardy Fish for a 6-3, 6-1 victory Thursday in the second round of the US Men's Clay Court Championships.
Fish, the top seed in the tournament and ranked ninth in the world, was playing for the first time since pulling out of Davis Cup competition against France for what he called a health issue.
''What happened a couple of weeks ago scared me,'' Fish said. ''I'm not over it. Anyone could see I wasn't myself.''
In other second-round results, South Africa's Kevin Anderson beat American Sam Querrey in three tight sets, Juan Monaco of Argentina was a straight-sets winner over Japan's Tatsuma Ito and Ryan Sweeting won the all-American match against Bobby Reynolds.
The 136th-ranked Russell knew he had a great opportunity against Fish.
''In the beginning, I thought he was playing pretty well and it was neck and neck and then his game definitely deteriorated big time,'...