Barcelona reportedly sent scouts to watch a quartet of Borussia Dortmund players in their 0-0 draw with Bayern Munich, writes Spanish publication Sport via Sky Sports.
The La Liga side have reportedly held a long standing interest in midfielder Ilkay Gundogan, who is expected to leave Dortmund at the end of the season amidst reports he is unwilling to extend his contract with the Bundesliga side.
He, though, is not the only player Barcelona are supposedly interested in, with Julian Weigl, Marco Reus and Pierre-Emerick Augameyang on the club's radar.
The Blaugrana are expected to face a tough battle to lure Gundogan to Camp Nou, with Manchester City and Juventus both keen on securing his services.
Aubameyang, meanwhile, has attracted interest from Premier League sides, while the Gabon international has previously spoken of his dream of playing for Real Madrid.
For more stats on Barcelona, click here to view their WhoScored team page
