Borussia Dortmund CEO Hans-Joachim Watzke insisted that his side have to 'fight against big clubs with oligarchs and the Arabian states' to keep hold of their star players.
Dortmund star Erling Haaland is currently in the process of leaving the Bundesliga side in favour of reigning Premier League champions Manchester City.
The 21-year-old underwent medical tests in Brussels on Monday afternoon before confirmation of the £63million deal, expected before the weekend as Sportsmail understands a deal between City and Haaland's camp was completed last week.
Borussia Dortmund CEO Hans-Joachim Watzke insisted that his side have to 'fight against big clubs with oligarchs and the Arabian states' to keep hold of their star players
Having scored 85 goals in 88 appearances, Haaland will bid farewell to the Dortmund supporters after their final Bundesliga game of the season against Hertha Berlin on Saturday.