In the closing stages of the Australian Open it was said that Rafael Nadal stood to become only the third man to win all four grand slam singles titles at least twice. Who are the others? I assume Roger Federer must be one? asked Jenny Olsson
Actually Federer hasn't done this - his record haul of 17 grand slam singles titles includes only one at the French Open, mainly thanks to the dominance of the man who ended his Aussie dreams in 2014, Rafael Nadal.
It's fairly easy to work out the identity of one of the men involved here, since Rod Laver did the calendar-year grand slam twice, in 1968 and 1969. Overall Laver won Wimbledon four times, the Australian three times, and the French and US titles twice each.
The other man to win all of them at least twice is another Australian, Roy Emerson: he won his home title no fewer than six times, and the other three twice each.
The only other men to win all four grand slam singles titles at least once are Andre Agassi, Donald Budge and Fred Perry.
Turning to the ladies, Steffi Graf won all four singles titles at least four times; nine other women have won all four. Margaret Court won them all at least three times, and three others (Chris Evert, Martina Navratilova and Serena Williams) won them all at least twice.