Sign up now! Sign up now! Sign up now? Sign up now! That icy wind rattling the rafters is the cold reality of what follows the closure of the transfer window, a hungover pall of regret. Despite £3.5bn shelled out in the men’s window, several things will not be happening in the Premier League when they might have been. When Arsenal host Chelsea for a most super of Sundays, Vinícius Júnior will not be playing in their attack, and neither will Gabriel Martinelli, whose lengthy social media disgrac…