Carlos Alcaraz insisted believing in himself is more important than match sharpness, after booking his place in the French Open quarter-finals.

The 21-year-old is through to the last eight at Roland-Garros for the third year running - the youngest player to achieve the feat since Novak Djokovic (2006 to 2008) - after a dominant 6-3 6-3 6-1 victory over Felix Auger-Aliassime.

Although one of the favourites to go all the way in Paris, Alcaraz's preparations for the clay-court major were hampered by an injury to his right forearm.

The Spaniard was forced to withdraw from the Barcelona Open and Italian Open, while his fitness struggles were evident when Andrey Rublev beat him in the Madrid Open quarter-finals.

But Alcaraz, who continues to wear a supportive grip on his right arm, has not appeared too affected so far this fortnight, and seems to be going from strength to strength.

"The most important thing is to believe in myself," he said after beating Auger-Aliassime. "It doesn't matter that I don't have too many matches on my back and that I didn't come with a lot of rhythm.

"After every practice and every match, I was getting better and better and that was easy for me. On Phillipe Chatrier, it is easy for me to play.

"I had to put as much effort in as I could. I felt strong in the rallies, and I was going to have my chances to break his serve and the good intensity in the match helped a lot. If I made him feel in trouble on his serve, I knew I was going to have a lot of chances.

"I'm really happy with my performance today. I played a really high level of tennis. I know that Felix [Auger-Aliassime] is a great player. We were both playing great tennis today, but really happy to get that win in the end."

Next up is a mouth-watering quarter-final showdown with 2021 runner-up Stefanos Tsitsipas for a second straight year at Roland-Garros, with Alcaraz eyeing his sixth victory from six meetings between the players.

"I love this challenge and these kinds of matches," he added. "I have seen a lot Stefanos' matches lately. He has a lot of confidence right now and is playing great tennis.

"I think I have the key against him, so I will try to make him in trouble. I will try to show my best and, hopefully, the crowd will enjoy as much as me."