Rafael Nadal has played professional tennis since 2005, giving fans 15 years worth of incredible play and 13 Roland Garros titles. At 34, the Spaniard has accomplished more than anyone most in the sport's history. But that history may start to become a little fuzzy.

While in London for this year's ATP Finals, Nadal spent time taking a Q&A on the highlights of his own career, seeing if he can remember his greatest moments. This series of questions may be hard for casual fans, but Nadal answered almost all of them correctly.

Here's a look at some of the questions:

Q: When did Rafa Nadal turn pro?

"Fifteen."

Q: Where did Rafa Nadal play his first ATP Tour match?

"Mallorca."

What tournament did Rafa Nadal make his first final?

"Auckland."

Q: And what year?

"Uh, 2003." (This was one of the few questions Nadal answered incorrectly—it was 2004).

Nadal is currently 1-1 in round-robin action in London after defeating Andrey Rublev in straight sets on Sunday, but losing in two tiebreaks to Dominic Thiem on Tuesday.

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The Spaniard has never won the ATP Finals, a missing title on an otherwise nearly perfect resume.

Check out the latest episode of the TENNIS.com Podcast with Nick Monroe:

Nadal answers quiz 
questions about his 
career

Nadal answers quiz questions about his career