Stefanos Tsitsipas is taking inspiration from the grandfather he has never met after battling through to round two of the men's singles at Tokyo 2020.
Alexander Zverev had an altogether more comfortable progression at Ariake Tennis Park, while home favourite Kei Nishikori earned an impressive upset win.
Felix Auger-Aliassime was unable to make the most of two-time defending champion Andy Murray's withdrawal, but it was a good day for Hubert Hurkacz.
Here's the pick of the action from day two of the men's singles.
TSITSIPAS OUT TO EMULATE GRANDFATHER
Greek ace Tsitsipas, a French Open finalist this year, had to dig deep for a three-set win over Philipp Kohlschreiber.
Should he manage to win gold in the Japanese capital he would be matching the feat of his grandfather, who won the football competition representing the Soviet Union in 1956.
"I've never had the opportunity to meet him. But my mom told me stories of his career and how he got it," he said. "He kind of inspires me in a way. I know what kind of athlete he was, with all the achievements and all the trophies. I'm proud of him.
"It's something good, a legacy that is being carried on in the family. I'm happy to be the next in the family to be competing at the Olympics."
ZVEREV LOVING OLYMPICS EXPERIENCE
Fourth seed Zverev coasted past Lu Yen-hsun 6-1 6-3 and spoke of how much he is enjoying being around other German athletes.
"Normally you don't have those guys around that much, you have your friends, of course you have people that are around you, but you don't sleep in the same room as them," he said.
"Yes it is very different but in a way very enjoyable. The Olympics are once every four years, and it’s five years now, so I think everybody is enjoying it and everyone is having the best time that they can."
Nishikori is playing at a fourth Olympics and upset fifth seed Andrey Rublev 6-3 6-4. For the 31-year-old the motivation is simple.
"It's [playing in Japan] something I always dreamed of when I was little," he said.
"Especially now, with the Covid situation, if I can win as many as I can, I think it will bring better news, that's something I'm trying to do this week."
AUGER-ALIASSIME FAILS TO MAKE MOST OF MURRAY ABSENCE
Auger-Aliassime was scheduled to face Murray before the Team GB star pulled out with a quad issue and will instead focus on doubles.
The Canadian was felled by Murray's replacement Max Purcell, though, the Australian winning 6-4 7-6 (7-2).
Fellow seed Gael Monfils also crashed out but Hurkacz was a 6-2 6-4 victor over Luke Saville, while Diego Schwartzman also made it through.
Raducanu breezes into second round at Eastbourne
Emma Raducanu is through to the second round at Eastbourne after a commanding straight-sets victory over Sloane Stephens on Tuesday.
Despite an early scare, Raducanu cruised through, winning 6-4 6-0 in just one hour 17 minutes.
Raducanu and Stephens traded blows early on in the first set, with both getting double breaks to stay neck-and-neck before the Briton edged it in the final game by breaking the American's serve once more.
She then brushed Stephens aside in just 25 minutes for the second without dropping a single game, to set up a meeting with Jessica Pegula in the next round.
Data Debrief: Raducanu in control
Raducanu finished off the match in style, winning the last nine games in a row, and broke Sloane's serve six times.
The 21-year-old finished with 23 winners to just 13 unforced errors to tee up a marquee match-up in the second round.
Djokovic will only play Wimbledon if title in reach after surgery
Novak Djokovic will only play at Wimbledon if he feels he has a chance of winning the tournament, with a decision on his involvement to be made before Friday's draw.
Djokovic tore the medial meniscus in his right knee at the French Open earlier this month, withdrawing ahead of a scheduled quarter-final against Casper Ruud.
He underwent surgery on the injury less than three weeks ago but still travelled to SW19 on Monday and was seen out on the practice courts.
However, the Serbian will only participate if he feels he has a realistic chance of an eighth Wimbledon crown, which would equal Roger Federer's all-time record.
"I didn't come here to play a few rounds," Djokovic told BBC Sport. "You can never know 100% what is going to happen at a tournament, but I'm going to make a decision based on the feeling that I have.
"If I know I can play close to my maximum or at maximum, then I'll play. If not, then I'll give somebody else a chance to play."
Asked if his maximum meant a title push, Djokovic replied: "That's why I'm here.
"I don't plan to retire or for this to be my last Wimbledon. The injury happened at an unfortunate moment but it's part of the sport."
Having gone through a two-hour session with bandaging on his affected knee on Monday, Djokovic added his recovery is going well and said he will give himself as much time as possible to make a decision.
"It's been going well. Rehab is going in the right direction every single day, a few per cent better and better. That's what's giving me hope and encouragement," he said.
"I still have a week left, which is plenty of time. I'm going to give my best to have a clear understanding of where I am before the draw is made, and we'll take it from there.
"I'm taking things gradually. I'm not pushing myself 100% yet but I'm hoping that's going to come in the next few days."
Raducanu 'grateful' and 'excited' having 'rekindled the love for tennis'
Emma Raducanu is thrilled to have "rekindled" her love for tennis, with the former US Open champion admitting she is "in a lot better spirits on and off the court".
The world number 168, who had not played since the Madrid Open in April, marked her return from injury with a run to the Nottingham Open semi-finals just over a week ago.
Last year, Raducanu underwent wrist and ankle surgery that, at one point, confined her to a mobility scooter, but she has prioritised fitness over competition during the 2024 season.
Having missed the French Open to focus on preparing for the grass-court season, she has also opted not to participate for Great Britain in the forthcoming Olympics.
The 21-year-old is now stepping up her preparations for Wimbledon, which continue when she faces Sloane Stephens in Eastbourne on Tuesday.
And Raducanu will enter the contest against her fellow former Flushing Meadows champion with a real spring in her step.
"I really feel like I'm in a lot better spirits on and off the court," she told BBC TV. "It's a nice feeling for me because it hasn't always been the case.
"I'm very happy to have rekindled the love for tennis and just enjoying the challenges that come with it and not getting so down about it, just trying a way to go around.
"I'm just really grateful to have this feeling again because it's something that I feel like I've been missing in a way for the last few years.
"I haven't felt this good about my tennis and excited about it and passionate for a long, long time."
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