Mauricio Pochettino said Chelsea's late surge to the verge of European qualification was a just reward for the club's patience during a difficult season.
Pochettino's side won 2-1 at Brighton to climb into sixth place in the Premier League with one game left.
Cole Palmer put them in front when he headed his 22nd goal in the 34th minute and Christopher Nkunku's 64th-minute strike put Chelsea further ahead.
The Blues will be guaranteed a place in next season's Europa League if they avoid defeat against Bournemouth at Stamford Bridge on Sunday or if seventh-placed Newcastle fail to win at Brentford.
"We have improved results and performances. When you build something you need time but it always looks like an excuse at a big club," Pochettino said.
Palmer has been the star for Chelsea this season following his surprise move from Manchester City. "To get back into Europe would be a step in the right direction," Palmer said. "All credit to the manager. All the players love the manager and want to fight for him."
AGENCE FRANCE-PRESSE
Christopher Nkunku inflates a blue balloon to celebrate his second-half goal against Brighton. AFP
Mauricio Pochettino
