Newcastle United, Arsenal and Liverpool were just three of 30 clubs who sent scouts to a packed Allianz Arena on Saturday to watch Bayern Munich and RB Leipzig in action.
It was a shock defeat for Thomas Tuchel's men with Leipzig running out 3-1 winners and spoiling Munich title hopes as Borussia Dortmund leapt to first place in the Bundesliga.
90min quotes sources reporting that dozens of scouts filled the stands to keep an eye on a number of players rumoured to be making a move away from both German sides this summer.
As well as Arsenal, Newcastle United, and Liverpool, representatives from Manchester United, Manchester City and West Ham travelled abroad to see potential shopping targets in the flesh.
Bayern Munich star Joshua Kimmich is said to be considering his future after eight years at the side, where he moved to from Leipzig in 2015, and scouts in attendance will have been keeping an eye on the versatile midfielder.
For Newcastle United, it is more likely that scouts were keeping tabs on Munich's Benjamin Pavard and Leipzig duo Dani Olmo and Dominik Szoboszlai.
Eddie Howe is expected to splash out in the summer transfer window. Despite ruling out spending millions of pounds on single signings, the Magpies boss will need to freshen up and bolster his squad ahead of a fixture schedule made even busier by Champions League qualification.
The versatile Pavard has also been linked to Barcelona and played a full 90 minutes in the match, picking up a yellow card in the second half.
It was a better day out for Olmo and Szoboszlai, the latter closed off the scoring with Leipzig's third goal from the spot just minutes before the final whistle.
The midfielder has played games when asked about his transfer plans this summer, previously refusing to say he would definitely stay at Leipzig but refused to comment when pressed on the matter by German press on Saturday afternoon.
Should Newcastle move for the 22-year-old playmaker, it is expected that Leipzig will demand nothing short of £61 million to let their star go.