Valtteri lined up fifth on the grid and, while he lost touch with the leading group in the first stint, he was able to claw back ground on the SuperSoft tyre in the second half of the race.
However, with Monaco being such a tricky track to overtake on, there wasn't much more Valtteri could do and he crossed the line P5.
"I think strategy-wise it was the best we could do," Valtteri explained. "The HyperSoft degraded very quickly for me and Lewis.
"We saw on Thursday that the SuperSoft wasn't that good for our car but it was the best tyre to be on in the end.
"It was much more robust than any other tyre and the pace was there. I just couldn't do anything with the pace.
"Strategy-wise I wouldn't do anything differently. It's just when you are starting from P5 in Monaco you need to hope that something is going to happen in the race.
"At some points, I had a good pace and then the others started to struggle with the UltraSoft so we were really hoping that they needed to stop again. But, unfortunately it never happened."