It seems that every summer there is a messy and painful transfer saga that drags on throughout the course of the window. It usually involves Manchester United. Two summers of wrangling with Borussia

Manchester United find themselves in a complicated race to sign Sporting Lisbon striker Viktor Gyokeres this summer

The prolific Swedish striker is at the epicentre of a tantalising transfer saga. Amid a flurry of rumours linking Gyökeres with a glut of clubs dotted all over the continent, Arsenal and Manchester United were thought to be leading the queue of suitors.