Serena Williams welcomes Roger Federer to the ‘retirement club’

NET LOSS: Serena Williams has welcomed Roger Federer to the ‘retirement club’ after the 20-time grand slam champion announced he will bring his professional tennis career to a close (Oli Scarff/PA)
Serena Williams has welcomed Roger Federer to the “retirement club” after the 20-time grand slam champion announced he will bring his professional tennis career to a close.
Federer has been struggling with a knee problem for the last three years and, aged 41, has accepted defeat in his bid for one last hurrah.