The comment was seen as a reference to De Grasse, who pushed Bolt to the line in the Olympic 200m semi-finals, eliciting a finger-wag from the greatest sprinter in history.
Though De Grasse has not run a legal sub-10 second time this season, he did run a strongly wind-assisted (+4.8 m/s) 9.69 in Stockholm back in June.
It was not revealed on which leg De Grasse suffered the torn hamstring, which happened in a Monday training run. I'll be back stronger and faster than ever.
It was a point of pride for Andre De Grasse - the Jamaican great acknowledging his presence at the Rio de Janeiro Olympics.
All signs pointed to a solid world championships for De Grasse.
"That's what I keep reading and what my team keeps telling me, so I've got to prove myself again", the 30-year-old said, ahead of the blue riband event of the IAAF (International Association of Athletics Federations) World Championships. After Bolt competes in the 100m, the final of which is scheduled for Saturday [5 August] night, he will be part of the Jamaica team for the 4x100m relay, which is due to climax on the penultimate evening of competition on 12 August.
Andre De Grasse's coach says the star sprinter's withdrawal from the world track and field championships isn't only a personal blow for De Grasse, but for Canadian fans too.
The limited edition Legacy spikes were presented by Wellesley and Jennifer Bolt, who proudly stood on stage to hand over his final pair of Puma spikes as a professional athlete.
On the face of it, the onus is on an absolute novice, Christian Coleman, and two old world title-winning foes, Justin Gatlin and Yohan Blake, who have been burned far too often by Bolt already down the years.
At the 2016 Olympics in Rio de Janeiro, De Grasse won bronze in the 100 and - after pushing Bolt all the way in the semifinals - took silver in the 200.
Notably, Coleman is widely regarded as the man to fill Bolt's shoes after the latter's retirement.
"I didn't know I would be 100m world record holder growing up, I had no idea".
But after an arduous year of competing both indoors and outdoors for Tennessee, Coleman will not compete in the 200 in London (he clocked 19.85 in Lexington, the third fastest time this year), instead focusing his efforts on the 100.
He profited when Bolt fouled out of the 2011 World Championships and did the 100m-200m double in his compatriot's absence in the Jamaican trials this year.