Bayern Munich's Joshua Zirkzee scored on his Bundesliga debut, just two minutes after coming on to the pitch, in the last-gasp 3-1 win away at SC Freiburg. The 18-year-old Dutchman came on in the 90th minute before breaking a 1-1 deadlock, becoming the youngest player to score a goal this Bundesliga season. Bayern's Serge Gnabry added another in the final minute of injury time to put the result beyond doubt, crushing the hopes of a determined home side. "When you score two goals with just minutes remaining to win the game, of course the bus ride home will have a different feel than if it had gone otherwise," said Bayern caretaker boss Hansi Flick. It was business as usual early for Bayern, with Philippe Coutinho's chip over goalkeeper Mark Flekken cleared off the line after just two minutes. In the 16th minute, 19-year-old Canadian Alphonso Davies put in a superb cross from the left wing, with Robert Lewandowski on the spot to open the scoring. It was Lewandowski's 19th league goal of the season - and the sixth time he opened the scoring for Munich this campaign. The goal seemed to calm Bayern, with the Bavarians content to dominate possession. After the half-time break, Freiburg showed the form that has taken them to sixth in the table, catching Bayern on the counter to create several half chances. Vincenzo Grifo equalised in the 59th minute, nailing Janik Haberer's cross to give Bayern goalkeeper Manuel Neuer no chance. Freiburg had several chances to take the lead as the clock ran down, with Bayern's players visibly shaken by the home team's relentless pressing. The win sees Bayern go into third place, four points behind Leipzig and Borussia Moenchengladbach. Flick said he had faith in Zirkzee after some impressive showings on the training pitch. "I simply thought that when another winger came on he could score - he is a striker and he shoots well, also in training. He's been with us (the main team) for three weeks and the development has been noteworthy," Flick said. "There were two completely different halves. The first half we could've lead two or three to nil, but I must say that Freiburg in the second half played well."