MASON, Ohio — With an unorthodox playing style one rival described as “good sloppy,” Daniil Medvedev has been cleaning up on the ATP Tour.

Medvedev defeated Jan-Lennard Struff, 6-2, 6-1, on Thursday in the third round of the Cincinnati Masters for his 41st win of the season, tying Rafael Nadal for the tour lead. In the last 17 days, Medvedev has had 11 wins, all in straight sets.

Medvedev, a 23-year-old Russian, is now ranked a career-best No. 8. He was ranked outside the top 50 a year ago, losing in the preliminary qualifying rounds at this tournament.

This year, he arrived at Cincinnati after reaching back-to-back finals in Washington and Montreal, falling to Nick Kyrgios and Nadal.