Jose Mourinho vented his frustration after his side battled hard to claim a draw against a spirited Sunderland at the Stadium of Light .
Courtois is convinced they can be satisfied with their form ahead of Wednesday 's game against Tottenham at Stamford Bridge .
Jose Mourinho vented his frustration after his side battled hard to claim a draw against a spirited Sunderland at the Stadium of Light , but Courtois is convinced they can be satisfied with their form ahead of Wednesday 's game against Tottenham at Stamford Bridge .