Rafael Nadal’s astonishing 21-match and 50 set unbeaten run on clay came to an end after Dominic Thiem dumped the Spaniard out of the Madrid Open in the quarter-finals.

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Not only did Nadal lose his unbeaten streaks, he also lost his world number one ranking to long term rival Roger Federer.

Federer isn’t competing on clay this year as he prepares to defend his Wimbledon title this summer.

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Despite Federer not playing since March 24th, he will return to the top due to Nadal losing world ranking points from his win in Madrid last year.

So how can Nadal regain his world number one spot?

The Daily Express report that Nadal must win the Italian Open to restore top spot, as he would claim 820 ranking points, with Federer currently 720 ahead of the Spaniard.

If Nadal does triumph in the Italian Open, he must then also claim the French Open to head into the grass court season as number one.