Gus Poyet has told Sunderland's official site that his side need to ensure that they do not rest on their laurels, even if they beat Fulham in the FA Cup tonight.
The Black Cats face a replay against the Championship side later this evening, but Poyet believes that they will need to stay grounded whatever the result.
If Sunderland do win the fixture the feeling around the Stadium of Light will be much more positive - after they picked up an important win over Burnley in the Premier League on Saturday - but Poyet is determined to keep their good form going.
“We cannot think that we have accomplished something important because we need to keep improving, whilst winning plenty of games in the next few weeks," he said.
Sunderland's first match against Fulham, which was drawn 0-0, appeared to be the final straw for many of the club's supporters who were desperate to see their team show more attacking intent.
The Wearsiders have been one of the lowest scoring teams in England this campaign, but they have started to put more importance on getting numbers forward and it paid dividends against Burnley, as they collected the three points in a 2-0 win.
It has relieved some of the pressure building on them, but Sunderland will know a defeat tonight will put them under scrutiny again.
At the moment Poyet's side are four points above the relegation zone and they face fixtures against Swansea City, Queens Park Rangers and West Bromwich Albion over the coming weeks, in a run which could define their season.