Liverpool midfielder Lucas admits he has not been surprised by Brazil team-mate David Luiz's smooth transition to the Premier League.
Defender Luiz, 23, made the switch to Chelsea from Benfica in January and has already proved a big hit at Stamford Bridge.
He scored a vital goal against Manchester City last weekend and has slotted into the Blues backline with ease.
Luiz joins fellow former Benfica and Brazil man Ramires in West London and Lucas is pleased to see his compatriots performing so well, despite the fact that they play for a rival team.
"I've known David since I was maybe 19 years old and we used to play for the Under 20s together," he said. "I am not surprised [with his impact].
"I am really, really happy with the way he has arrived because I know how difficult it is to adapt in the Premier League.
"But he is already scoring a lot of goals and maybe people were not expecting this. And they have been important goals as well so I am happy with the way he is playing.
"Ramires is also doing really well and we are happy because I know how difficult it is for a Brazilian player to come to the Premier League and do well.
"Hopefully more Brazilians will come and help teams in the Premier League."
Lucas also believes that former Red Fernando Torres, who also joined the English champions in January, will prove a big hit at Chelsea once he breaks his scoring duck.
"We know it was a big change for him," he added. "He did really well for Liverpool and scored a lot of goals.
"I think as soon as he scores the first goal he will shine the same as he did at Liverpool."
Brazil take on Scotland in a friendly clash at the Emirates Stadium on Sunday and Lucas is looking forward to his time with the national squad.
"The new manager is trying to give opportunities to the young players and trying to build a new team so a lot of new faces are here," he remarked.
"But we just have to take the opportunity to try and be in the squad all the time and look to the Copa America."