The Grand Slam tennis circuit features the Australian Open, French Open, Wimbledon and US Open. Which men and women have taken home the most titles?

Tiebreaker scoring is measured in points (e.g., 1, 2, 3, etc.). In the event two players or teams are tied 6-6 in a set, the tiebreaker set goes to the side who reaches seven points first with a winning margin of at least two points.

Barbora Krejcikova’s Wimbledon defence is still alive — but only just. The Czech squeezed past American Caroline Dolehide 6-4 3-6 6-2 in a second-round tussle that was all grind and no grandeur. There was zero champion’s polish on show as the Czech creaked her way into the third round,