Wimbledon respond to Andy Murray criticism after Serena Williams withdraws with injury

Wimbledon has responded after two-times champion Andy Murray led criticism over the state of the grass surface. The Championship faced back-to-back retirements on day two following injuries suffered by Adrian Mannarino and Serena Williams.
Both players slipped on the same end of centre court and their injuries were enough to force their pair to retire from the tournament.
Mannarino, who was celebrating his 33rd birthday, had fought incredibly well against 20-times Grand Slam winner Roger Federer before falling.
The Frenchman had led two sets to one against the Federer but was pegged back before his injury prevented him from continuing.
Williams, 39, left centre court in tears after having her first-round tie against Aliaksandra Sasnovich ended prematurely.
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