Italy's Matteo Berrettini bounced back from the disappointment of an injury ending his Japan Open last week by squeezing past Christopher O'Connell 7-6, (9) 7-6 (6) in the Shanghai Masters first round on Thursday.
The Italian, who retired with an abdominal injury in the second round in Tokyo last Friday, had his fitness given a stern examination by the Australian in a lung-busting match lasting two hours, 13 minutes.
Next up for the former Wimbledon finalist is No. 14-ranked Holger Rune.
Other first-round winners included Marcos Giron, David Goffin, Jaume Munar, Zhou Yi, Jakub Mensik and Miomir Kecmanovic.
The 32 seeded players received a first-round bye, including top-ranked Jannik Sinner and second-ranked Carlos Alcaraz, who won the China Open against the Italian on Wednesday. Sinner starts against Taro Daniel of Japan, and Alcaraz faces Shang Juncheng of China.
