But world No 575 Pannu was competitive until 3-3 in the first set, when he was broken after an extended game.
At that stage, the physical demands started to bite.
“I lost my legs and tried to take a toilet break and change and get them back,” said Pannu, who was still dripping with sweat minutes after the match. “But I couldn’t and, at this level, if you feel gassed and you run out of steam, there’s just nothing you can do.”
From there it was downhill. Pannu never gave up but lost the bite on his serve and the feel on his groundstrokes.
“I thought I was prepared but I couldn’t hang in there,” said Pannu.
It was a reality check for 25-year-old.
He was coming off an extended block of domestic matches but the fitness base wasn’t enough.
“If I want to compete at this level, the physicality needs to get a lot better,” said Pannu. “I just need to sit down with the Tennis New Zealand fitness coaches and just kill myself in the gym.”
But Monday was also about learning, in front of a packed house, in what Pannu described as an “amazing” experience.
“Despite the result and the score, which is very disappointing, I’m proud of the way that I competed and went toe to toe with a former top 10 player,” said Pannu.
Pannu promised he wouldn’t be overawed by centre court experience and so it proved.
He served well early, banging down several wide aces, and looked confident, charging to the net to put away some sliding volleys.
The 25-year-old also did his best to rouse the crowd – urging more support – and they loved a delicate drop volley in the seventh game, that crept over the net by inches.
But the unforced errors crept in from there, as Gasquet’s class started to show and there was less intrigue, as the Frenchman eased to the finish line.
Gasquet, who boasts numerous wins over top-10 players, including Roger Federer, Novak Djokovic and Andy Murray, will face fourth seed Francisco Cerundolo (world No 30) in the second round on Wednesday.