His backhand can effectively handle high bouncing balls which has been a big problem for a lot of single - handers , including Roger Federer .
According to Thiem , he changed to his now - famous single - handed backhand at the advice of his coach .
Thiem 's backhand can effectively handle high bouncing balls which has been a big problem for a lot of single - handers , including Roger Federer .
According to Thiem , he changed to his now - famous single - handed backhand at the advice of his coach .