Alexander Bublik pulled off a superb comeback to stun reigning Halle Open champion Jannik Sinner and reach the Halle Open quarter-final.

In yet another shocker, World No. 1 Jannik Sinner was upset in his second-round match on grass at Halle by Kazakhstan’s Alexander Bublik on Thursday, marking the Italian’s first tournament since losing in the French Open final.

(Reuters) -World number one Jannik Sinner's bid to win back-to-back Halle Open titles was ended on Thursday following a 3-6 6-3 6-4 defeat by Alexander Bublik in the last 16, the top seed's first defeat to a player outside the Top 20 since 2023.