If he was playing regularly, he would get his form back but with Mendy in a team it doesn't look like Sane is gonna get a run of games any time soon. Sane isn't a wing-back, therefore, he can't play in a 3-5-2 formation against better oppositions because he isn't good defensively and he would be ineffective going forward from deep. 4-3-3 is what suits Sane but with Mendy fit and firing there is no place for Sane in a 4-3-3 because Mendy is unbelievably good going forward and he stretches the pitch as well. Sane isn't a tippy-tappy style of player, thus, he's ineffective when playing a bit more inside from the left flank. For instance, Sterling last season originally played on the right but most of the time he ended up in a box with Walker overlapping him. It's because Sterling is more of a tippy-tappy player than Sane is. Sane has to run at defenders with pace. Pep clearly doesn't want to play both Mendy and Sane on the left because offensively they're too similar. Sane won't play on the right flank either because Bernardo and Mahrez are there. I can only see Sane starting games if Delph starts ahead of Mendy. Last season Sane was in a same situation while Mendy was fit. He only cemented his place in a starting line-up once Mendy got injured and both Delph and Zinchencho weren't natural left-backs. I like Leroy a lot but it's such a shame that you have to adjust the system to suit Sane and not the other way round because Leroy is a bit too one dimensional.