American Wolf into first ATP Tour semi-final as Bublik serves 15 double faults in Florence

American J.J. Wolf took advantage of 15 double faults from Alexander Bublik as he beat the Kazakh 3-6, 7-5, 6-1 at he Florence Open on Friday to reach his first career ATP Tour semi-final.

Wolf, ranked No 75, will face Swede qualifier Mikael Ymer next.

Bublik hit 19 aces but most of them were cancelled out by double-faults, though seven of them came in a first set that he won. His 29 unforced errors didn’t help, however, and he went down in three sets.

The American beat Italian wildcard Francesco Maestrelli (4-6, 6-2, 6-1) and No 4 seed Maxime Cressy (6-3, 6-4) ahead of his victory.

Earlier in the tournament, Bublik, seeded No 7 and ranked No 43, won against Chilean Cristian Garin (7-5, 6-2) and Frenchman Corentin Moutet (7-5, 6-4).

Florence ATP 250, other quarter-finals results (Palazzo Wanny, EUR 612.000, most recent results first):

• Felix Auger-Aliassime vs. Brandon Nakashima
• Lorenzo Musetti vs. Mackenzie McDonald
• Mikael Ymer beat Roberto Carballes Baena: 6-4, 6-2