Doubts powered Rafa resurgence

Rafael Nadal admits he doubted he'd ever win another Grand Slam title after a three-year drought at the majors and an ongoing battle with injuries and poor form.

On Sunday, the 31-year-old Spaniard coasted to a record 10th French Open title, demolishing Stan Wawrinka in a brutally one-sided final which also earned him a 15th Grand Slam crown.

Nadal triumphed 6-2, 6-3, 6-1 to become the first man in history to win the same major 10 times.

"I have doubts every day but that's good as it makes me work hard with more intensity," he said. "You have to be humble and accept that you have to work to improve things.

"I have doubts today, I had doubts in the last three years, I will have doubts in a few days. Life is never clear. If you have no doubts, then you are very arrogant. I am not an arrogant person."

After winning his ninth Roland Garros and 14th major in 2014, Nadal's best performance at the Slams was two quarter-final spots.

But he finished runner-up at the Australian Open in January, losing in five sets to Federer and he was back in business.

He dominated the clay court season with titles in Monte Carlo, Barcelona and Madrid.

Nadal went through the French Open without dropping a set for the third time in his French Open career. He lost just 35 games in total, second only to Bjorn Borg's record of 32 in the Swede's 1978 title-winning season.

"To win 10 Roland Garros titles is magical," added Nadal. "I had tough times last year so it's great to have big success again."

Despite his dominance at the French Open, Nadal said he never took victory for granted.

"At 4-1 in the third set I knew I was close. At 5-1, I thought probably I am going to win this.”

Nadal said he had not given up hope of taking back the world number one ranking that he last held in June 2014.

“If I win I have chances to become number one -- if I play well, why not?"