Daniil Medvedev avenged a Wimbledon loss to Hubert Hurkacz in a three-set thriller while Stefanos Tsitsipas made impressively light work of the in-form Casper Ruud at the National Bank Open.
Top seed and world number two Medvedev appeared headed for another defeat to Hurkacz before fighting back to prevail 2-6 7-6 (8-6) 7-6 (7-5) and reach the semi-finals.
The Pole won a five-setter at Wimbledon in the pair's only previous meeting before going on to stun Roger Federer and reach the semis, but could not repeat his feat in Toronto.
Though Medvedev failed to convert the only two break point opportunities he had, his work in the tiebreaks was enough to put him over the top as he served 23 aces to nine for Hurkacz.
The Russian now faces a semi-final matchup against John Isner, who won a clash of veterans with 11th seed Gael Monfils 7-6 (7-5) 6-4.
Earlier Friday, Tsitsipas claimed a 6-1 6-4 victory over Ruud, who entered the clash having won each of his previous 13 matches.
It was Tsitsipas' 45th win of the season, a figure unmatched by anyone else on the ATP tour, and he needed just 74 minutes to complete it.
The 23-year-old won each of the first five games of the match and only made four unforced errors in the opening set.
Although Norway's Ruud improved in the second, he failed to make the most of a rare break opportunity and that seemed to jolt Tsitsipas into life again, the Greek swiftly breaking and then serving out the match.
"It is very nice to see myself perform at this level," Tsitsipas said afterwards. "I was sticking close to the baseline and coming in, taking the ball early. It was my intention from the very beginning, and it worked perfectly.
"Playing against a guy like him, who gets every single ball back, is always very challenging. There is some sort of concentration levels you have to reach to perform to your best. These kinds of matches always teach me things that I can expose for next time."
Up next for Tsitsipas as he targets a place in the final is Reilly Opelka, the big-serving American who defeated Roberto Bautista Agut 6-3 7-6 (7-1), plundering 18 aces along the way.
On this day in 2015: Great Britain end long wait for Davis Cup win
Andy Murray inspired Great Britain to Davis Cup victory for the first time in 79 years on this day in 2015 after success in the final against Belgium.
Britain had last got their hands on the trophy in 1936, when Fred Perry and Bunny Austin helped defeat Australia.
When Murray completed a straight-sets win against David Goffin in Ghent to clinch it, he completed one of the most impressive feats of his career.
The Scot’s 6-3 7-5 6-3 triumph against the Belgian number one at the Flanders Expo was his 11th win in the competition that season.
Murray spearheaded the victory and claimed 11 of the 12 points which Britain needed for the title, eight in singles and three in doubles with brother Jamie. The only player not a member of the Murray family to contribute was James Ward.
Three other players have won 11 rubbers in a season since the current Davis Cup format was introduced in 1981, but Murray became the first to do so all in live rubbers and remain unbeaten.
On their way to victory, Britain defeated the United States 3-2 in Glasgow, France 3-1 in London and Australia 3-2 in the semi-finals in Glasgow before Murray sealed a 3-1 success against Belgium.
Murray said: “I probably haven’t been as emotional as that after a match that I’ve won.
“I’ve been pretty upset having lost matches before. But I’d say that’s probably the most emotional I’ve been after a win.
“It’s incredible that we managed to win this competition. I didn’t know that would ever be possible.”
Like father, like son – Shaqueel van Persie makes Youth League debut
Robin van Persie handed a UEFA Youth League debut to his son Shaqueel for Feyenoord on Tuesday.
Van Persie, the former Arsenal and Manchester United star, is now coaching Feyenoord's Under-18s team and the Under-19s team.
And while taking charge of the latter side in the Youth League, Van Persie handed his son Shaqueel his debut in the competition as a 56th-minute substitute against Atletico Madrid.
Van Persie junior could not help his father's team avoid defeat, however, with Iker Luque scoring the only goal of the game in the 81st minute.
Shaqueel the real deal?
Shaqueel van Persie made his European debut five years and 104 days after his father last played in a European match for Feyenoord, where he finished his career.
The 17-year-old, who was born during Van Persie's stint at Arsenal, began his youth career with Manchester City before moving to Feyenoord in 2017, a year before his father joined the same club.
He has already represented the Netherlands at Under-16 and Under-17 level.
LeBron James shrugs off minutes milestone after suffering heaviest career defeat
No player in NBA history has spent more minutes on the court than LeBron James, but the latest record means nothing to the Los Angeles Lakers star.
That is because it came in what was James' heaviest career defeat – a 138-94 loss to the Philadelphia 76ers on Monday.
In his 21-year NBA career, James' previous worst loss came by 42 points in a 136-94 reverse to the Indiana Pacers in February 2019.
As Joel Embiid racked up 30 points, 11 rebounds and 11 assists in the Sixers' rout, James accumulated another 30 minutes on the court.
That took his career total, across both regular season and postseason games, to 66,319 minutes in his career, passing Kareem Abdul-Jabbar's 66,297 minutes.
But the record was of little solace to the 38-year-old, who told reporters: "That doesn't mean much to me."
Asked about what the Lakers need to do to ensure heavy defeats do not become a common occurrence, James said: "What needs to change in order for that not to happen again? Um, a lot.
"I don't know how a team [should respond]. I can only speak for myself, and I don't like it."
James' teammate Anthony Davis said: "Feel like we just weren't together. A lot of quick shots, one-pass shots, no-pass shots.
"They started making a lot of shots. And when their lead kind of opened up a little bit – 15, 20, 25 – I think we all tried to be the hero to make the team come back instead of just sticking with it.
"We've got to look at it, embrace it, own it. Guys don't take it personally for whatever's said in the film, and then move on from it."
It was a bad day for both Los Angeles teams, with the Clippers also losing.
They went down 104-113 to a Denver Nuggets team that was shorn of Nikola Jokic, Jamal Murray and Aaron Gordon.
Former Laker Russell Westbrook became embroiled in a debate with a fan.
"I mean, it's unfortunate," Westbrook said.
"Fans think they can say whatever they want. I'm not going to say [what was said] now because it's not appropriate, but I'm just protecting myself.
"It's just unfortunate fans think they can get away with saying anything and, personally, I won't allow it. I've [taken] a lot of people saying anything and getting away with it, but I won't stand for it."
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