Borussia Dortmund chief Hans-Joachim Watzke admits they're likely to make a big sale this summer.

Armenia midfielder Henrik Mkhitaryan has been linked with Arsenal and refused to rule out a move to Chelsea this week.

Asked about the rumours, Watzke conceded: "I do not think we will renew all contracts (expiring in 2017, including Mkhitaryan)," said Watzke.

"(Mats) Hummels, Mkhitaryan and (Ilkay) Gündogan? Probably not all three will be here next season.

"As indeed it is impossible to see the departure of all three next summer."