Sloane Stephens in Luxembourg Open quarterfinals

The Associated Press

LUXEMBOURG (AP) -- Sloane Stephens advanced to the quarterfinals of the Luxembourg Open by beating Yvonne Meusburger 7-5, 6-4 Thursday.

The American, ranked 12th in the world, has yet to lose a set in Luxembourg and will play Stefanie Voegele on Friday. The 54th-ranked Swiss player struggled to beat Karolina Pliskova 6-1, 3-6, 6-3.

In another second-round match, Karin Knapp beat Andrea Petkovic 7-5, 7-5.

What to Read Next