Ignoring their monetary values if sold on, Kolorov would be the one who should be worried IMO
But the monetary values can't be ignored if we're spending 300m this summer, hence why we're selling players like Kelechi. Also Pep loves Kolarov's left footedness and build up, and it might come down to Otamendi being told he's going to be 4th choice, is he going to be happy with that? Kolarov would be, he's old and leaving next summer anyway, but Nico is supposed to be in his prime, and if he's got any half decent offers to start somewhere...