Sancheaz, Costa and Coutinho among those in spotlight on transfer deadline day

Alexis Sanchez, Diego Costa and Philippe Coutinho could all seal big-money moves on what promises to be a dramatic final day of the Premier League transfer window.

Sanchez's future has been in doubt for the best part of a year but losing the Chilean so late in the summer, with little chance of finding a replacement, would be a bitter pill to swallow for Arsenal supporters.