Chelsea are considering an approach for Liverpool and Tottenham target Jackson Martinez, according to the Metro.

Jackson Martinez

Blues manager Jose Mourinho has long wanted to sign striker Wayne Rooney and has already had two bids rejected by Manchester United. The Premier League champions' chiefs and their manager David Moyes refuse to let the England international leave and are confident of keeping him at Old Trafford.

The report claims Chelsea are set to end their pursuit of Rooney and have turned their attention to Martinez. The west London club are preparing a £25m bid to land the Colombian striker as Mourinho looks to bolster his attacking force.

The 26-year-old had an impressive last season, scoring 26 goals in the league and was the top scorer in his debut season in Portugal. Martinez is believed to have a £35m release clause in his contract. However, Chelsea remain confident that a £25m bid could see them land the free scoring goal machine.

Earlier reports suggested that the South American striker had signed a new deal with the Portuguese champions. However, Martinez has denied this and confirmed there have been no talks over extending his stay at Porto.

"I don't want to force my departure from Porto. In fact, I really hope not to. Today the question I have is whether I extend my contract or go elsewhere. For example, the press reported that I had agreed a new contract until 2018. I hadn't even started to think about it because nobody at Porto had called me to talk about it," Martinez explained.

"I'm very calm about my situation here and I will continue to do my job and respect my contract with Porto. I prefer not to think about the speculation. I'm fine at Porto, but I cannot rule out the possibility of leaving," the striker said.