The Blues began their title defence in spectacular fashion at Stamford Bridge, writes Stewart Coggin.
Last season's top scorer Drogba scored three times, Florent Malouda netted twice and Frank Lampard also found the net as the Blues hit their stride against the newly promoted Baggies.
"Didier did a fantastic job," Ancelotti said of his hat-trick hero. "He worked very hard for the team, as did Anelka and Malouda. It is very important to have this mentality from our strikers because they are working for the team.
"Drogba scored a lot of goals last season and started very well this season. I think he can do the same this season. He is a fantastic striker."
HIGH TEMPO
He continued: "It was a good start. We played a good game and scored a lot of goals. The players are very close to their best condition.
"I think we started the first half well. We kept a high tempo on the pitch. But they were in the game until the second goal for us (before half-time). After that it was easier because we had more space in front and we had a lot of possibility to score."
The club had given their World Cup players extra time to recover, meaning several of them do not have a full pre-season under their belts. Ancelotti believes that the signs are now good that they are approaching full fitness.
"We knew we could have a problem because we decided to give the players we had at the World Cup a holiday," he said.
"It was important for them to have a good recovery and we knew we couldn't play them at the start of pre-season, but I think John Terry, (Ashley) Cole and (Frank) Lampard were in a good condition. They are not in the best condition but they have time now to get in the best condition."
Ancelotti added that Brazilian midfielder Ramires, who joined the club from Benfica on Friday, would be his final signing of the summer and that he should be fit to face Wigan Athletic next Saturday.
TOO HARSH
Ancelotti's counterpart Roberto Di Matteo accepted that lessons will have to be learned quickly after a chastening experience at Stamford Bridge.
The Italian felt the scoreline did not reflect the nature of the match but acknowledged that the second Chelsea goal on the stroke of half-time was key.
"When you play the champions away on the first day of the season, you know it is going to be a tough day for you," he said.
"I felt the score was probably a bit too harsh on us. I didn't think there were six goals between the teams. Not many teams come away with something from Stamford Bridge.
"The goal before half time was important for them because it gave them confidence.
"The first three goals were probably bad because they were from set pieces and we made mistakes. And then you are 3-0 down and it is tough to come back against a strong side like that.
"We know we will have to learn and improve very quickly. We won't be playing Chelsea every week and not every team has the quality they have."