Roger Federer brushed aside world number one Rafael Nadal 6-4, 6-3 to win the Shanghai Masters on Sunday and register his fourth victory of the year over his Spanish rival.
The Swiss world number two beat Nadal in the finals of the Australian Open and Miami Masters and in the last 16 at Indian Wells earlier this year, and never looked like losing to his long-time rival in Shanghai, firing 10 aces as he cruised to victory.
Federer, the only man who can still stop Nadal ending the year as number one, took an hour and 12 minutes to claim his sixth title of the year and his second Shanghai crown with a clinical performance.
It is his second Shanghai crown (2014) and 27th at the ATP World Tour Masters 1000 level.
The 36-year-old world No 2 broke once in each set to emerge triumphant and register his 15 victory over Nadal.
"I wasn't here last year because of injuries, so it's just so, so nice to be back in Shanghai," Federer said.
"It's a wonderful moment for me to be back here playing against my good friend and rival, Rafa... We didn't think maybe we were going to have the year we did.
"I definitely didn't, so it's just nice to share this court with you today and hopefully there's more to come in the tournaments we've got left. It's been a pleasure playing against you again today."
The victory cut Nadal’s head-to-head record against Federer to 23-15.
The Spaniard has not beaten the Swiss in 2017, losing in the finals of the Australian Open and Miami Masters and in the last-16 at Indian Wells.
Playing under a closed roof at the Qi Zhong Tennis Center, Federer sprinted out of the blocks, breaking Nadal in the opening game and the Spaniard had little answer to the sheer variety of shots coming across the net.
The Swiss refused to take his foot off the pedal in the second set, breaking Nadal to go 3-2 up and keeping his cool to wrap up victory.
He sealed the win on his opponent's serve, winning the second of three match points to claim his 94th career title.
Federer has won all four meeting between the two this year.
In each of Federer's three previous victories over Nadal this season - at the Australian Open and ATP World Tour Masters 1000 events in Indian Wells and Miami - the Swiss won more than 75 per cent of first serve points.
His delivery was on song once again in Sunday's final, claiming 83 per cent of total service points in closing out the first set at 6-4 after breaking in the opening game.
The second set featured more vintage Federer. The second seed scored a stunning drop volley winner and forced Nadal to misfire on a forehand to claim the break for a 3-2 lead.
Executing his gameplan to perfection throughout the 71-minute affair, he sealed victory on his second match-point when a Nadal forehand found the net.
Federer, who won the tournament in 2014, has enjoyed himself on the fast courts of Shanghai this year, while Nadal will look back on a successful stint in Asia after winning last week's China Open.
"I want to congratulate Roger and his team for a great year. Today I think you played a fantastic match, so many congratulations," Nadal said.
"This year has probably been the most successful of my career here in China... It's been a great two weeks and I feel very happy after a long year to be able to have the results here. It's very important for me."