With our our incredible young squad being another 'year older' by the start of next season and if we keep Tielemans and buy a world level Winger then that 11 has serious potential to break the top 6.
To improve the 11 right now
CM - Keep Tielemans
Winger - World level winger (the level under world class to be realistic) - What we lost when we didn't replace Mahrez.
To improve the squad
Another Central creative midfielder as if Tielemans was injured we have nothing else similar.
Left Back.. As Fuchs will be leaving unless we have a youth full back whos next big thing.