Grigor Dimitrov believes Roger Rasheed's taskmaster coaching can steel him for a five-set marathon Wimbledon quarter-final with defending champion Andy Murray.
Dimitrov blitzed Leonardo Mayer in straight sets at SW19 on Monday, to book his second grand slam quarter-final of the season and his career.
The 23-year-old has credited former Australian Rules and tennis star Rasheed's unrelenting coaching style for his impressive campaign.
Bulgarian 11th seed Dimitrov will be gunning for his 10th straight win on grass following his Queen's Club triumph against Murray on Wednesday.
Rasheed pipped Murray's fitness coach Jez Green in a charity 200m sprint at Wimbledon Park Athletics Track in the build-up to the All England Club tournament.
"I've been working for all those moments," said Dimitrov of a potential five-set showdown with Murray.
"I think it's a great feeling to get into that kind of match.
"Of course the best-case scenario is straight sets.
"At the end of the day I'm not playing a mediocre player, though, so I just need to be on my best behaviour.
"We get along pretty good, my team and his team are on pretty good terms, we always have a lot of jokes.
"I have no hard feelings: one thing is off the court, another thing is on the court - that's going to be the exciting part.
"Hopefully it's going to be no hard feelings anyway after the match."
Dimitrov believes Rasheed's renowned arduous and lengthy training sessions have helped him bolster his approach, leaving him on the cusp of that long-awaited grand slam breakthrough.
The Bulgarian said Rasheed has also helped him to pick and choose from his extensive armoury of shots.
"I haven't played that yet," joked Dimitrov of Australian Rules Football. "It's not the best thing to run into him, that's for sure.
"He has helped my discipline, given me better shot selection: the most important thing is to give 100 per cent from each other every day.
"I think that's what we both deserve and what we owe to the game."
Dimitrov refused to allow Murray's home-ground advantage faze him when the two meet on Wendesday.
"It's his home basically, here. He's been playing a lot of matches on Centre Court," said Dimitrov.
"He knows his way around the grass pretty good, he's a great mover.
"I'm just going to play my game, I'm not going to step back. I just want to come out with my big game and play my aggressive tennis.
"I don't want to adjust to my opponent.
"All the crowd is behind him, basically everyone is with him.
"That gives you of course an extra edge to whoever you play on the other side.
"But at the same time I think that adds a little bit of pressure.
"I don't think that's going to be an issue during the match though."
Dimitrov has quickly shaken off his 'Baby Fed' moniker this year, the nickname that stuck given his similarity in style to seven-time Wimbledon champion Roger Federer.
Murray said it has been an unfair cross for Dimitrov to bear, but the man himself is confident he is now moulding people's perceptions.
"It was kind of easy to hear that in the beginning, it was kind of funny and we were all laughing about it," said Dimitrov of his long-worn nickname.
"But at some point when I started to establish myself as a player on the tour, this thing was starting to get out of hand.
"At the time it put a little bit of pressure on my shoulders.
"But I think now all that is starting to fade away: I've proved myself not once, not twice, that I'm a different person, a different player."