i mean watch the vid pls. at 2:27 chiesa starts to run back with kalulu pretty comfortably. they are like a couple of meters apart, but at the same level on the pitch around the halfway line. chiesa is running back with the guy, but as juve123 mentioned, he was too comfortable. he's easily the faster player of the two. if you pause the vid at 2:30 you can see chiesa in a much worse position than he was 3 seconds before. he should have been close to kalulu, but he's caught in nowhere land between the ball guy and kalulu:
both the speed and the direction of chiesa's run was a meh effort. with a better run he could have easily intercepted the ball and prevented kalulu to even touch it. the sliding tackle attempt happened too late.
chiesa is a great player, one of the 4 guys of the current squad i'd actually mind losing because odds are the replacement would be much worse, but this was a poor effort. i'd be pissed if the coach wasn't pissed.
i remember one episode from conte's first season. we were leading very, very comfortably (3-0 or 4-0 iirc) vs novara, we started a counter, and barza ran like crazy towards the novara goal. he was one of the very few players who haven't scored during that season before that match, so his motivation was understandable: he wanted to score. but conte started to shout at him like a madman saying "barza i don't want to concede". that's the mentality we're missing.