Manchester City’s Marc Guehi celebrates scoring their second goal with Antoine Semenyo Credit : Isabel Infantes/Reuters Manchester City have their “free soul” and as this Premier League title race tightens, as the pressure might become inhibiting, Rayan Cherki might be the liberating difference. Contrast his maverick brilliance, his individual spirit, with just how uptight and tense Arsenal feel right now . They certainly have no one like him or, more accurately, no one allowed to play like him. For 45 minutes, this was an undeniably dull and flat performance by City, lacking in inspiration. It would have been a first half that delighted Liam Rosenior, the Chelsea head coach. If anything, Chelsea provided the greater threat, with Cole Palmer fired up against his former club. And then Cherki turned it on with two superb assists in six minutes – the second was breathtaking – as City cut the gap at the top, fully exploiting Arsenal’s home defeat by Bournemouth , to six points.…