Chelsea captain Terry went on holiday to Tenerife before reporting up with England, and says seeing Manchester City's Paraguayan striker working hard during his own break on the Canaries isle kept him on his toes.
Terry, who was given a fitness programme while on his short break, said: "They do encourage you to have two weeks off. Even that's hard.
"You go away and you see another footballer running at night and you think: 'S**t, I'm going to be two weeks behind him.'
"I saw Roque Santa Cruz when I was away. I was training for 30 minutes in the morning and he was in there for an hour-and-a-half or two hours!
"I went away, like a lot of the lads, but you don't switch off. You get up and train twice a day, morning and night. You relax around the pool, but you stay fit and sharp.
"You know in your mind that there's such a big game coming up.
"As a player, you know this is the last game. After this, you can completely relax and switch off."