Chelsea fans are going to need to be at their best tonight when the players return to action in the Premier League. Mauricio Pochettino is leading his Blues into a crucial match against his former side, Tottenham, and Stamford Bridge is likely to be rocking off the back of the importance of the occasion. Qualifying for Europe is the clear goal, however is fading after inconsistent performances and results throughout the season. Finishing in the top seven is also likely to be crucial in the manager keeping his job at the club, amid growing concerns that he could be replaced this summer. Team se…