Rafael Nadal beat Karen Khachanov 7-6 (7/3) 6-4 on Saturday to set up a final with birthday boy Stefano Tsitsipas at the Toronto Masters.
The Spanish icon will try on Sunday to spoil the 20th celebrations of the Greek youngster, who reached the second final of his career by beating Wimbledon finalist Kevin Anderson 6-7 (4/7), 6-4, 7-6 (9/7), saving a match point in victory.
World number one Nadal won a battle of the tennis generations with Tsitsipas last April in the Barcelona title match.
"To win this match is important, it's very important to be in the final of Toronto," Nadal said after running his season record to 39-3 in a match which ended after midnight local time.
"I'm motivated every day when I wake up, there is always something to improve," said the 32-year-old.
"I want to stay around for as long as possible (in tennis)."
"Four wins against top 10 players. I would never imagine that I could pull this out in a single tournament. I don't know if I got lucky with all those players, but somehow it happened that I played four top 10 and managed to beat them, which is a huge achievement for me and for my game this week."
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