Borussia Dortmund manager Jurgen Klopp insists striker Roberto Lewandowski will not be leaving the club this summer.

The Polish forward, top scorer during a double winning campaign for Dortmund, has been linked with moves to Manchester United and Bayern Munich.

A number of Dortmund's stars are expected to be subject of interest during the transfer window with the likes of such as Mario Gotze and Shinji Kagawa impressing during the club's successive title wins.

Robert Lewandowski
Lewandowski scored 22 goals last season.

"We will not sell Robert Lewandowski - not for any price," Klopp told German newspaper Suddeutsche Zeitung.

"Our biggest obligation is to have a strong squad and one that enables you to play a successful game.

"He will remain at our club."

United boss Sir Alex Ferguson was reportedly in the stands for Dortmund's German Cup final win over Bayern Munich two weeks ago, and was understood to be looking at a number of potential targets.

Last week, Lewandowski's agent Maik Barthel stated that United were interested in the striker and that the player had rejected the offer of a new contract from his current employers.

"I can confirm that the (new contract) offer of Borussia Dortmund is insufficient," Barthel told Bild.

"I am also able to confirm an interest of Manchester United in the services of Robert Lewandowski."

The forward scored 22 goals last season, ahead of Bayern's Mario Gomez and Schalke hitman Klass-Jan Huntelaar in the race for the golden boot, and will be looking to follow in the footsteps of current Newcastle United forward Papiss Demba Cisse, who has enjoyed a fruitful first six months since his move from the Bundesliga.

With Michael Owen having already been released by the club, and Dimitar Berbatov seemingly on the way out, United could be in the market for a new striker, to assist Danny Welbeck, Javier Hernandez and Wayne Rooney.

A lack of goals eventually worked to deny United the title to the benefit of Manchester City, who saw goal difference take them a first title for 44 years.

Having missed out on the Premier League title, Ferguson will be eager not to allow Mancini's team dominate for the forseeable future and could use the transfer market to close the gap.