Roger Federer produced a vintage performance as he overcame a determined Kei Nishikori to reach the semi-finals of the Shanghai Masters.
The top seed turned on the style in Friday's last match on court, recording a 6-4 7-6 (7-4) victory after one hour and 51 minutes.
Having needed three sets to get beyond Daniil Medvedev and Roberto Bautista Agut in his last two outings, Federer appeared in danger of needing a decider again when he trailed 4-1 in the second-set tie-break.
However, with his first serve suddenly firing again, the Swiss reeled off six successive points to remain on course to retain the title he lifted last year with victory over Rafael Nadal.
Nishikori was hit with an early blitz by Federer, the defending champion eventually breaking in the opening game of the contest at the sixth attempt.
He recorded another to move 4-1 ahead and while Nishikori claimed one back, Federer served out the set to love in the 10th game.
What. A. Match. @rogerfederer battles past an in-form Kei Nishikori 6-4, 7-6(4), reaching his seventh semi-final of the season .— ATP World Tour (@ATPWorldTour) October 12, 2018
How impressed are you with the top seed's level? pic.twitter.com/2nlZqQCjvU
The second set followed a similar pattern at the start, the 20-time grand slam winner taking the first game after creating a break-point opportunity with a sizzling backhand return.
After failing to take opportunities in the second and fourth games, Nishikori finally drew level at 3-3 before going on to seize control in the tie-break.
Yet the eighth seed from Japan saw his advantage wiped out in a hurry as Federer roared back to set up a last-four clash with Borna Coric, who had defeated Australian Matthew Ebden 7-5 6-4 earlier in the day.
The 13th seed from Croatia will hope for a repeat result of the pair's last meeting - he stunned his illustrious opponent at the Gerry Weber Open final in June to claim the title.
|BREAKING NEWS: Ibrahimovic re-signs with LA Galaxy for 2019|
|Mourinho sacked: Solari not worried for Real Madrid job|
|Mourinho sacked: 895 days and more than £700,000 in five-star luxury|
|ES Tunis 1 Guadalajara 1 (6-5 on penalties): Dhaouadi holds nerve to settle ill-tempered affair|
|Murphy lands permanent Tigers role|
|Mourinho sacked: Real Madrid´s Marcelo lauds ´great coach´ after United exit|
|Unadkat, Varun the top buys at IPL auction|
|Emery prepared to give youth a chance in north London derby|
|Tottenham extend Vertonghen contract until 2020|
|Panthers safety Reid receives seventh random drug test of 2018|
|Kovac relishing Klopp challenge in Champions League|
|Bancroft to return, teenager Lamichhane to fly the flag for Nepal in Big Bash|
|Liverpool still have plenty of work to do - Klopp|
|Messi ´never imagined´ his success after winning record fifth Golden Shoe|
|WATCH: Timberwolves´ Gibson tries to block shot with his trainer|
|Mourinho sacked: Klopp praises departed Manchester United boss|
|Mourinho sacked: Jose the best Manchester United manager since Ferguson - Gerrard|
|Mourinho sacked: Ferdinand calls for ´fresh ideas´ at Man United|
|Mourinho sacked: The mystique has gone as United spell ends in divorce|
|´He´s an interest not only for us but for many´ - Zola praises rumoured Chelsea target Wilson|
|Mourinho sacked: Pochettino focused on Spurs amid Manchester United rumours|
|Mendis eyes double-century for departing Samaraweera|
|Mourinho sacked: Zola expects Jose to be in another job ´soon´|
|Mourinho sacked: Five reasons it went wrong at Manchester United|
|Mourinho sacked: Jose´s Manchester United record in Opta stats|
|Mourinho sacked: Pogba, Ronaldo and Jose´s biggest bust-ups|
|Mourinho sacked: Blanc, Solskjaer - the men who could steady the United ship short-term|
|Mourinho sacked: The football world reacts|
|Mourinho sacked: What former United stars said after Liverpool loss|
|Mourinho sacked: Where next for the axed Manchester United boss?|
|UEFA to investigate alleged racist incidents at Vidi-Chelsea|
|Australia unchanged for rest of India series|
|Mourinho sacked: Pogba´s tweet a dig at departing Man United boss?|
|Newton left frustrated by shoulder injury as Panthers lose again|
|Mourinho sacked: Pochettino & Zidane lead potential Man Utd replacements|
|Mourinho sacked: Neville urges Man United to go for Pochettino|
|Boylen pleased to see Bulls react to red rag in Thunder fracas|
|Icardi and Inter ´very far´ apart in contract negotiations|
|Mourinho leaves Manchester United|
|Curry humbled by latest milestone|
|Robertson: ´Unbelievable´ Alisson will bounce back from error|
|Curry scores 15,000th regular-season point in Warriors win|
|Rams star Gurley ´day-to-day´ with knee inflammation|
|Saints poised to clinch NFC top seed after topping Panthers|
|Mathews, Mendis centuries frustrate New Zealand|
|Kohli: Relentless Australia deserved victory|
|Relief for Paine and Australia after ending Test drought|
|Australia level series with dominant win over India|
|Libertadores holders River learn group as CONMEBOL boss calls for end to violence|
|Chargers RB Gordon planning to return against Ravens|
|Kobe Bryant visit motivated Browns´ Jabrill Peppers|
|De Bruyne: Fatigue not behind injury woes|
|´That´s not my concern´ - Broncos coach Joseph on job security|
|Lowry on Leonard´s free agency: I just want him to be happy|
|Yankees give Sabathia $500K bonus despite ejection|
|Ronaldo confirmed Juventus interest in January – Mendes|
|Lakers guard Rondo to begin rehab stint in G League|
|Saiz to leave Leeds United for Getafe|
|Whyte thinks Joshua rematch is ´only a matter of time´|
|Greenwood stars as Man United end Chelsea´s FA Youth Cup dominance|
|Panthers tight end Olsen expects ´full recovery´ after surgery|
|Derby County 0 Nottingham Forest 0: Lampard´s men fourth after tense stalemate|
|Clermont lose former All Black Toeava for six months|
|MLS unveils revamped playoff format for 2019 season|
|Ferrari to celebrate Schumacher´s 50th birthday with museum exhibition|
|Rabiot set for PSG exit after cancelling contract talks|
|Pepe departs financially troubled Besiktas|
|Philadelphia Flyers fire coach Dave Hakstol|
|Eagles to start Foles v Texans|
|PSG matches against Montpellier and Dijon rearranged|