Borussia Dortmund look set to contest Arsenal and Liverpool in their reported pursuits of Kostas Mitroglou after Jurgen Klopp was spotted scouting the Olimpiacos striker.
Klopp was pictured in the stands during the World Cup playoff between Romania and Greece this week, which resulted in the latter advancing to Brazil, and Bild reports that Mitroglou was the reason for the Dortmund manager's attendance.
The 25-year-old, who has scored 17 goals in only 15 appearances for Olimpiacos this season, is being mooted as a potential replacement for Robert Lewandowski, who is expected to complete his protracted free transfer to Bayern Munich in the summer.
Mitroglou, though, is also reported to be a target for both Liverpool and Arsenal given his recent prolific form, and a move to the Premier League could still be on the cards for the Greece international.
It is claimed that Liverpool manager Brendan Rodgers had representatives at the game in Bucharest, during which Mitroglou scored, and the Anfield club are being backed to make a £7 million January bid.
Arsenal have also been credited with interest in the player, with the expectation that Arsene Wenger will reinforce his goalscoring department in the transfer window, given the need for back-up to current first-choice striker Olivier Giroud.