Rafael Nadal described long-time rival Novak Djokovic as one of the more complex players he's ever met as they prepare to clash for the 52nd time today with a final spot at stake. World No.1 Nadal, the 2008 and 2010 champion at the All England Club, trails Djokovic, the 2011, 2014 and 2015 winner, 26-25 in a rivalry which began at Roland Garros 12 years ago. Along the way, they have fought out a series of epic battles including Djokovic's Australian Open final win in 2012. At five hours and 53 minutes, it was the longest final at a Slam. The following year, Nadal downed the Serbian the semi-finals in Paris.

"It's always a big challenge to face Novak," said Nadal, 32, who is back in the semi-finals at Wimbledon for the first time since 2011. "He is one of the more complex players that I ever saw in our sport. You can't win against him if you don't play well." Nadal said. For his part, Djokovic is eyeing a 13th major after making the semi-finals of a Slam for the first time since finishing runner-up at the 2016 US Open. "My results were not up to the standard that I had before," said Djokovic. "I'm trying to use the experience and memories of being in the final stages of Grand Slams."