Paulinho says he will put friendship to one side for 90 minutes when he lines up for Tottenham against Chelsea at White Hart Lane this weekend.
The Brazilian may well line up for Spurs alongside compatriot Sandro, and could also come face to face with the likes of David Luiz, Oscar, Willian and Ramires tomorrow.
Despite the array of samba stars lining up for Chelsea, Paulinho, who joined Tottenham from Corinthians in a £17 million summer move, says allegiances will be put to one side when he steps out on to the pitch.
"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."
Paulinho has taken to life in the England quickly since his summer switch and bagged his first goal in the Premier League - a 93rd minute winner against Cardiff - last weekend.
The Brazilian was just one of seven new arrivals for Spurs over the summer and was briefly the club's most expensive player before they landed Roberto Soldado for £26 million and Erik Lamela for around £30 million.
"The main challenge that he put forward was qualifying for the Champions League and fighting for the Premier League," Paulinho explained.
"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."