Stan Wawrinka is a three-time grand slam champion, but he has lately been attempting a comeback from injury. Toru Hanai / Reuters
Stan Wawrinka is a three-time grand slam champion, but he has lately been attempting a comeback from injury. Toru Hanai / Reuters
Stan Wawrinka says 'level is getting better' after reaching Sofia Open semi-finals
Three-time grand slam champion made a premature exit from Australian Open, but has since been winning again
Press Association
February 10, 2018
