Chelsea are considering a bid for Porto star Jackson Martinez if they fail to land Wayne Rooney from Manchester United, reports the Daily Express.
Jose Mourinho is currently preparing to launch a third and final bid for Roooney, believed to be in the region of £28m but is holding off until after their clash on Monday.
The Portuguese had declared his desire to sign Rooney whilst also stating that they have different options should United refuse to sell.
He recently told reporters: "We have plans B and C.
"Don't ask me names because it's difficult to speak about players from other clubs."
One of these other options is believed to be Anzhi Makhachkala striker Samuel Eto'o, with the striker available for as little as £5m.
However, ESPN is reporting that Mourinho has now set his sights on Porto star Martinez as he believes the striker is better fit for Chelsea's system.
The west London club are also baulking at Eto'o's wage demands of £300,000-a-week, forcing them to seek alternatives.
Martinez has been linked with a move away from Porto all summer after it became apparent that he had a £35m release clause, however Chelsea believe £25m will be enough to tempt Porto to sell.
The Colombian scored 34 goals in 43 matches last season and has been linked with the likes of Barcelona, Real Madrid and Tottenham in the past.