The Japanese driver initially thought that there must be something wrong with his car before he realised that he was being teed up for a shot at fastest lap.
Tsunoda was running in 10th place in the closing laps when a pit stop window opened up behind him, helped by the chasing Alex Albon having a track limits time penalty.
That gave the chance to have a free stop for soft tyres, and he duly bagged the fastest lap bonus point on the very last lap, while retaining his 10th place.
After the flag the disqualifications of Lewis Hamilton and Charles Leclerc moved him up to eighth, earning him a total of five points on the day, and exactly doubling the Faenza team’s total for the season.
"To be honest I got a heart attack when I had to box,” said Tsunoda. “Because I thought it was something like an issue from the engine.
“After I heard we go for fastest lap, okay, then I was relieved, but still a bit of pressure on, and we were able to still get the fastest lap, so it was good."
Source: Autosport