Jackson Martinez is thought to be Jose Mourinho’s back-up plan (Picture: Reuters)

Chelsea are thought to be readying a move for Porto striker Jackson Martinez, should their third bid for Wayne Rooney be rejected.

Manchester United’s Rooney remains Jose Mourinho’s top transfer target this summer, but the Blues have already been knocked back twice by David Moyes.

Chelsea won’t be making a third bid for the England international until after their match at Old Trafford on Monday, but Mourinho has already stated he has a ‘plan B and C’ should the pursuit of Rooney prove fruitless.

MORE: Mata staying but Jose confirms Blues departures


And it appears the next man on the Portuguese’s list is Porto striker Martinez, who has also attracted the attentions of Napoli.

Jackson Martinez (left) has a £30m release clause (Picture: Getty)

The Colombian international hit 29 goals in 38 appearances for his club last term and Porto won’t let him go without a fight, as they look set to hold out for the full £30m to trigger his release clause.

Meanwhile, the arrival of a new centre-forward could see Demba Ba depart the club, with several Premier League sides interested in a loan move for the 28-year-old.