Jaziri looked overweight from what I saw, and has probably ruined the rest of his year by not recovering from his injury properly. I don't think Guido is going to win any more matches this week, because frankly his level wasn't that good.
Malek has always looked a little stockier than the average player, but I don't think he is overweight at all. His run into the Top 100 was a bit surprising to me, and it seems he is simply struggling to get that rare form back. Might have been a fluke.