Top seed Frances Tiafoe moved into the quarter-finals of the San Francisco Challenger, but he was made to work very hard for it against Ryan Shane....
There was a number of shocks in the San Francisco Challenger first round on Tuesday, as a group of favoured players failed to make it out...
The third American Challenger of 2017 is underway in San Francisco, and we preview the tournament that features a number of NextGen stars hoping to qualify...
