Champions League side Atletico Madrid are among the clubs with a significant interest in Arne Engels. Celtic are expecting to receive more significant bids this summer, and Arne Engels is understood to be open to a move away from Celtic Park to play at a higher level. Celtic are unlikely to prevent him from leaving if a significant offer is made, but they have established their position following bids that were rejected in January. Celtic will be demanding a large fee this summer.

It is reported that Atletico Madrid are one of several top European clubs competing to sign Celtic's Arne Engels. The Spanish club faces competition from Nottingham Forest, and it is said that Borussia Dortmund are planning a move. Sources have indicated that Atletico have been closely watching the Belgian midfielder and have included him on their list of potential targets.