So by your logic grealish isn't good enough, we shouldn't have signed laporte from midtable Bilbao, fernandinho from the Ukrainian league - rubbish, rodri, stones, sane, zabaleta, kompany etc etc etc... Because Tierney didn't go from Celtic straight into a champions League team. Ok....Grealish and Van Dijk had clearly demonstrated they deserve/deserved the chance to play at a higher level. What is Tierney showing us, played for a team that steam rolled a load of part timers then moved to Arsenal where he has been part of a car crash of a defence that gets ripped to shreds nearly every week, hardly a great endorsement is it. When Van Dijk left Southampton there were rumors we were at the table, Grealish is apparently on the move this summer and he is linked with us and the rags.
Tierney left Celtic and went to Arsenal. Says a lot.