Oscar signed for Chelsea from Internacional in July 2012. AFP

Chelsea midfielder Oscar has directly addressed persistent transfer speculation linking him with a move to Juventus this summer, claiming to be fully aware of the rumours but insisting that he wants to stay at Stamford Bridge for 'a long time' having only signed a new contract in November 2014.

The Brazilian international featured 28 times last season as Jose Mourinho's side cruised to their first domestic title in five years with an eight-point buffer over former champions Manchester City, yet missed the club's last five games after sustaining a heavy blow to the head during an accidental clash with goalkeeper David Ospina during the goalless draw with Arsenal on 26 April.

Although he was deemed fit enough for a place on the bench during Chelsea's next match away to Leicester City, Oscar was not required to play at the King Power Stadium and subsequently received another setback when he injured his thigh during a training session prior to the title-clinching home clash with Crystal Palace.

That injury meant he was unable to represent his country as part of Dunga's 23-man squad for this year's Copa America tournament in Chile, where Brazil suffered a quarter-final penalty shootout defeat at the hands of Paraguay.

A lack of fitness has not prevented links between the 23-year-old and Juventus from resurfacing, however, and manager Massimiliano Allegri confirmed his interest in both him and Real Madrid's Isco last month amid reports from The Mirror that the reigning Serie A champions were preparing a cut-price £9m ($14m) bid for his services in preparation for the likely exit of Paul Pogba.

Oscar does not appear interested in a move to Italy at this time, however, choosing to once again pledge his long-term future to Chelsea eight months after agreeing terms on a new five-year deal at Stamford Bridge.

"No," he told the London Evening Standard when asked if he held any interest over joining a Juventus side who have won four consecutive titles and triumphed in the Coppa Italia last term as well reaching the final of the Champions League in Berlin.

"I know there has been a lot of talk about Juventus, but I am very, very happy at Chelsea. Last year I signed a new contract and I want to stay a long time at Chelsea. I have never been unsettled by what was being said."

Having played for Brazil's U23 team at the London Olympics and been part of the senior squad for the Confederations Cup the following year and the 2014 World Cup on home soil, Oscar has rarely had a chance to rest and complete a full pre-season over recent years.

He assured fans he is now back fit and training, while suggesting that his injury absence from the Copa has left him feeling revitalised ahead of the 2015/16 campaign.

"I missed the end of last season but now I am over the injury and back to full fitness," Oscar added.

"I have been able to make the start of pre-season and am here to prepare for the season. I haven't been able to do have a pre-season for the past five years because I have had to play so many games in the summer, so this pre-season for me is very important.

"Most players don't like to get injured, but it did force me to have a rest. This is important and now I have no injury and will be fresh for the season. It meant I had to miss the Copa America, but sometimes this happens in football and now I am feeling fresh."