Tottenham Hotspur are in the market for new midfielders this summer but Ange Postecoglou may already be growing a little frustrated. The transfer window hasn’t even really got going yet, but Tottenham Hotspur already have two signings on the way to the Tottenham Hotspur Stadium. Midfielder Lucas Bergvall and forward Timo Werner will both arrive this summer; Bergvall was agreed in February whilst Werner will be returning for another loan spell after a deal was agreed this week. This is just the start for Tottenham with Ange Postecoglou keen to make a raft of new signings this summer. The Totten…