Defending champion Jannik Sinner lost his second-round match on grass at Halle on Thursday to Kazakhstan’s Alexander Bublik, the Italian’s first tournament since his French Open final defeat. The world number one fell 6-3, 3-6, 6-4 to the 45th-ranked Bublik for the 23-year-old’s first defeat to a player ranked outside the top 20 since the summer of 2023. A few days before his defeat to Spaniard Carlos Alcaraz in the title match at the French Open, Sinner had easily dispatched Bublik in the quarter-finals at Roland Garros, dropping only six games. On Thursday, ten days before Wimbledon, Bublik claimed his second victory in six ties against Sinner. The Kazakh will play Tomas Machac in the quarter-finals after the Czech beat Hungarian Fabian Marozsan 6-2, 6-3 earlier in the day. Earlier world number three Alexander Zverev rallied from a set down to see off Italy’s Lorenzo Sonego and advance to the quarter-finals on grass in Halle. The 28-year-old German won 3-6, 6-4, 7-6 (7/2) against the 46th-ranked Sonego and next plays another Italian, Flavio Cobolli for a place in the semifinals.