Garbine Muguruza holds trophy.  [Photo/Agencies]

Muguruza's second break of the final allowed her to serve for the set and she duly managed that staving off two break-back points along the way.

A top quality first set had taken 56 minutes with Muguruza winning 41 points to 40 for Williams underlining the closeness of the contest.

Muguruza maintained her level of play and composure to start the second set with a third break of serve, but she then struggled on her own serve, coughing up a seventh double fault to hand back the advantage.

Scream of defiance

Williams though was struggling and this time it was the quality of her opponent's play rather than her own misgivings that were responsible for her struggles.

Muguruza made it three straight breaks of serve in the next game and moved out into a 3-1 lead.