Former World No. 3s Dominic Thiem and Stan Wawrinka have withdrawn from the Western & Southern Open in Cincinnati citing ongoing injuries to the wrist and foot, respectively, the tournament announced Thursday.
Thiem, the 2020 US Open champion, has not competed since 22 June after suffering a detachment of the posterior sheath of the ulnar side of his right wrist at the Mallorca Championships. The 27-year-old reached back-to-back quarter-finals at this ATP Masters 1000 event in 2016 and 2017.
Wawrinka, who owns 16 tour-level titles — including three Grand Slams — has not been in action since Doha in March. The Swiss player underwent left foot surgery that same month, and is continuing his recovery after a second surgery on the same foot on 21 June.
The 36-year-old holds a 3-3 record on the season, and sits at No. 30 in the FedEx ATP Rankings. He made the Cincinnati semi-finals in 2012 and the quarter-finals on three additional occasions.