But through the week , it was the other facets of his game which made people sit up and take notice .
Wawrinka 's signature shot has always been his single - handed backhand , which enamours aficionados .
Through the week , it was the other facets of Wawrinka 's game which made people sit up and take notice .
Wawrinka 's signature shot has always been his single - handed backhand , which enamours aficionados .