Tottenham star Paulinho will put friendships aside when he faces some of his Brazil team-mates against Chelsea.
Paulinho is set to come up against fellow countrymen Oscar, David Luiz, Willian and Ramires when Chelsea travel to White Hart Lane for an eagerly awaited London derby on Saturday.
Paulinho, who joined Spurs from Corinthians in the summer, admits the game against Chelsea is causing a big stir in Brazil with so many Selecao stars in action and he feels the game gives Spurs the opportunity to prove their credentials.
"There is a level of affection there, a friendship between us all," Paulinho told the Daily Telegraph. "But when we step onto the field of play we are there to defend ourselves and defend our team so I will be there fighting for Tottenham Hotspur.
"It's a big match here in London, and in Brazil, where many people will watch, and it's important for us, as a stepping stone also to win more games.
"We faced Arsenal and did not get the result we wanted [a 1-0 defeat]. But we are going down the right path so it's great to have this opportunity to play against Chelsea in order to prove our level.
"Within the club we know our ability and this will start with this match against Chelsea."
Tottenham are currently in second spot in the Premier League and Paulinho admits Andre Villas-Boas wants them to challenge for honours on all fronts this season
"The main challenge that he put forward was qualifying for the Champions League and fighting for the Premier League," added Paulinho.
"After that there are the cups - either in England or in Europe.
"Tottenham are a team that is going to enter these competitions to win them. Step by step we are reaching that level."