Carlos Alcaraz and Jannik Sinner came through tough tests at the Shanghai Masters to reach the last 16. World number one Sinner recovered from a set down to beat Tomas Martin Etcheverry 6-7 (3-7) 6-4 6-2, while Alcaraz earned a 7-6 (7-5) 6-3 victory against Yibing Wu.
