The sound of windows closing is causing nervousness around White Hart Lane. The summer transfer period is reaching its end with Tottenham Hotspur struggling to get any business done. Mauricio Pochettino is frustrated.
The bigger concern for the Spurs manager, beyond this summer, is that a window of opportunity may be closing. After three years of progress, this could be the season when Tottenham's momentum stalls.
Pochettino's style relies on relentless energy and the 46-year-old's training methods are notoriously exacting. Spurs sent 12 players to the World Cup, with nine of them representing nations that reached the semifinals.