Marion Bartoli was one of many rising stars who impressed at Wimbledon last week.
Sometimes top players lose to unknowns who never are heard from again, like Julie Coin who beat World No. 1 Ana Ivanovic in the second round of the 2008 US Open.
Other times the upset is a marked changing of the guard, like when 15th seeded Roger Federer upset four-time defending champion Pete Sampras in 2001 Wimbledon.
Here are eight up-and-comers who may be a flash in the pan or could be here to stay.