Let's say we sign Mendy, why would Bertrand leave Soton in a World Cup year to play back up at city? I just don't see it. Think we will sign one at that level.
"In a world cup year" is pretty irrelevant to Bertrand. If he's fit, he's going.
Who would even replace him? Cresswell? Gibbs? Shaw? No chance. The first 2 are a country mile away from good enough and Rose + Shaw is basically asking to be left with no fit options.
If Bertrand has any considerations about the WC, it will be that if he comes here and starts, he might get ahead of Rose, that's it. He probably still won't, but definitely won't if he's at Saints.