The Brazil midfielder scored on his World Cup debut against Cameroon and feels he may not have been able to celebrate his goal had he not moved to the Premier League
The midfielder replaced Paulinho at half-time in Brazil's Group A clash with Cameroon on Monday and sealed a 4-1 win with six minutes remaining.
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He told FIFA.com: "I've always dreamed of playing in the World Cup and wearing the Selecao jersey, but I knew how difficult that was, what with me playing in Ukraine for Shakhtar
"Last year, though, when I moved to England and began playing in a much bigger league with a much higher profile, I could see things coming together for me.
"I fought hard, chased my dream and got the call-up for the game with South Africa in March. Everything I did from June 2013 onwards was with the goal of making it here to the World Cup."
Brazil face South American rivals Chile at Estadio Mineirao in Belo Horizonte.