Teenager Taylor Fritz wins opener in Memphis Open

MEMPHIS, Tenn. (AP) Teenager Taylor Fritz, a promising American, won his opening-round match in the Memphis Open on Tuesday night beating Michael Mmoh 6-3, 6-4.

It was the second ATP World Tour win for the 18-year-old. Fritz relied on 10 aces and solid ground game to move into the second round, where he'll play No. 2 seed Steve Johnson.

The tournament's top four seeds—defending champion Kei Nishikori and Americans Johnson, Donald Young and Sam Querrey—received first-round byes.

Fritz, ranked 145th, rose nearly 1,000 spots in the ATP rankings last year and won for the first time in the U.S.

In other first-round matches Tuesday, No. 7 seed John Millman and No. 8 Damir Dzumhur advanced. Also, Spain's Marcel Granollers beat Malek Jaziri of Tunisia, 6-1, 6-3; Swiss qualifier Henri Laaksonen defeated Australian Matthew Ebden, 6-1, 3-0 (retired) and Ricardas Berankis beat Dudi Sela, 7-6(5), 6-2, 7-5.