Fernando Torres scored his second goal in consecutive league games in Chelsea's 4-1 win over Swansea City at Stamford Bridge but was then sent off. It capped a turbulent week for the Spanish striker.

Torres's 29th-minute strike against Brendan Rodgers's side was as cool a finish as his effort for Chelsea in the 3-1 defeat at Manchester United last Sunday. But as at Old Trafford, where he subsequently missed an open goal, the 27-year-old's joy was short-lived as Mike Dean sent him off 10 minutes later for a two-footed lunge on Mark Gower.

André Villas-Boas, the Chelsea manager, described the sending-off as a "pity". He added: "There is nothing [for Torres] to apologise for. The sending-off, I have nothing to say, it looks a good decision by the referee. It's part of the nature of the game and the referee has decided like that. It's a pity because the spectacle is promising and it could have gone on to be a good afternoon for us and the fans, who are the most important people in football. But in the end that's what the referee decided and we just had to adjust."

Swansea's manager Brendan Rodgers, who was formerly on the staff as a coach at Stamford Bridge, said that Torres's poor start to his Chelsea career may be causing him to be over-enthusiastic: "I don't think he's a malicious player. He probably feels it's there to be won and he's trying to show his intention at the moment that he's fighting for everything."

After scoring, Torres, gradually returning to the form that moved Chelsea to pay Liverpool £50m for him in January, had looked sharp.

In a side showing nine changes from the team that needed extra time and penalties on Wednesday in the Carling Cup against Fulham, Frank Lampard was placed on the bench by Villas-Boas.

Asked about the midfielder's exclusion, he said: "The decision today was mainly based on the fact we played 120 minutes on Wednesday and the players apart from Petr Cech and John Terry were fresh players. So we went nine players fresh to the pitch today. We have to make another decision for Valencia [on Wednesday] in the Champions League- and we hope this is the right one."We are team players and the players just want the team to perform. Frank is a fantastic player, a magnificent player. Sooner he'll be back to the team – sooner than you expect."

Rodgers concurred: "I only assume that [they were] looking towards the Valencia game. I think he'll end up like one of those players like [Javier] Zanetti at Inter Milan, who just keeps going. He may need to change positions as he gets older but Frank Lampard will continue to score goals. He's still got big ambitions to play and I'm sure he'll continue to do that."

• This article has been corrected. The original referred to Brendan Rogers as Blackburn's manager.