The National reports that Chelsea have added Polish duo Robert Lewandowski and Lukasz Piszczek to their list of summer transfer targets.
The Blues sees Lewandowski as an cheap option to strenthen the attack should they fail with their attempts to sign Porto star Hulk.
Lewandowski, who has long been linked with a move to rivals United, scored 22 times in 34 league appearances for Borussia Dortmund last season.
Lewandowski’s current contract with Borussia Dortmund is set to expire in the summer of 2016 and the Bundesliga side have insisted that they have no plans of selling the striker.
Borussia Dortmund right-back Piszczek is also a target for Chelsea as they look to bring in a replacement for Jose Bosingwa.
