Daniel Ricciardo is adamant there was no exaggeration at play when Lewis Hamilton appeared riddled with back pain following last weekend's Azerbaijan Grand Prix.
The seven-time World Champion appeared almost unable to climb from his car after 51 laps around the Baku City Circuit, with his car bouncing intensely.
Hamilton felt a cold sensation down his back, as was the severity of his car's bouncing, with the team having since claimed that he was subject to loads of up to 6G.
"There was talk about Lewis after the race. I saw some of his onboards, I saw pictures of him getting out of the car and stretching his back, and he wasn't exaggerating. It really was uncomfortable," Ricciardo has told PA.
"The position we sit in the car, we don't have much room to move so we are not prepared for the impacts.
"If that is up to a rule change, or the way the teams are setting up the cars, I am not 100 per cent sure. But I wouldn't like anyone to go through any unnecessary injury or pain."
Ricciardo felt "rattled" after Azerbaijan race
Complaining of his own back pains in Baku last weekend, Ricciardo told media, including RacingNews365.com: "It got worse and worse. And I sympathise with everyone that's had it now because it's bad.
"I genuinely feel rattled. I'm definitely going to help out when people talk about it.
"You know when professional basketball players bounced the ball really low? That's what it felt like someone was doing to my helmet.
"I know George [Russell] has been vocal about it. It's definitely not good for our general health and well-being."
Lewis will win races again, Ricciardo is adamant
Hamilton will race in Montreal after shaking off his back troubles in time for the quick turnaround. He will be looking to stop Russell from finishing ahead of him for the eighth consecutive race, something no teammate of his has ever done.
Ricciardo knows how it feels to be in Russell's shoes, after arriving at Red Bull in 2014 and beating four-time World Champion Sebastian Vettel in equal machinery.
But he has no doubts that Hamilton is not done fighting yet. He said: "I definitely think Lewis is as capable as ever.
"We all knew George was quick, and it was just how quick is he? How good is he? And he is proving he is very good.
"But I also wouldn't count Lewis out for having the ability to win this weekend, for example. I don't think he has lost anything, no, not at all."