The 27-year-old, who suffered concussion during Spain's 2-1 defeat to Italy on Wednesday, had been a doubt for this weekend's match at the Britannia Stadium.
However, Chelsea boss Andre Villas-Boas has declared that the striker is fit to take his place in the team on Sunday.
"Yesterday [Thursday] he still couldn't remember a couple of things from the game and from before the game [against Italy] but he was back in training and is up for selection," said Villas-Boas.
"We are favouring a 4-3-3 formation in our beginning, that's what we have been playing in pre-season, and we have a couple of players threatening for that central striker's position."
Torres scored one goal in eighteen matches for Chelsea last season following his £50m move from Liverpool in January.