• Striker's stock rises further after his four goals against Madrid
• Dortmund determined to stop possible move to Bayern
• 'I don't get feeling he is on the run,' says coach Jürgen Klopp
In a dark corner of the Borussia Dortmund museum, just on from the trophies, photos and pennants, beyond the BVB table football, is a mini cinema. The seats here are yellow and plastic, lifted from the stadium and built into a small "stand". On the wall is a screen where a video plays on a loop. It's not all black and white, in fact most of it is black and yellow, but it needs updating now. "It always shows the same films from many years ago," grinned the coach, Jürgen Klopp. "I hope they will soon show a film of these goals from [Robert] Lewandowski."
This was a historic night, marked by four astonishing goals from the Polish striker, and the Dortmund manager was not going to let anyone ruin it. Success may come tinged with sadness, the growing realisation that the better his players perform the more likely they are to depart, but Klopp refused to think about that. Besides, he claimed that Lewandowski was staying. That is far from certain but these have been days in which the manager has sought to put off a worrying future and focus instead on a brilliant present.
Against Real Madrid it worked: the build-up to the game had been hijacked by the suspiciously ill-timed news that Mario Götze was joining rivals Bayern Munich after they paid his €37m release clause; the game itself began with him providing the perfect cross for Lewandowski to score the opener.
Three more goals followed, the third of them especially stunning, Lewandowski dragging the ball back to create a bit of space before hammering the ball into the net. Even the penalty was pretty impressive. "The goals were incredible," Klopp said. "The third is worth every single cent of what the TV channels pay for the rights to show the games."
Asked whether Lewandowski was offside for one of his goals, as José Mourinho had implied, Klopp adopted what appears to be his default setting: he laughed. "There were so many Lewandowski goals that I cannot think which one he means," he smiled, blowing out his cheeks. "The fourth was a penalty and, yes, it is a penalty. The third was so brilliant that no referee in the world is allowed to take this back." He did not add that there was nothing wrong with the first or the second, either.
It was some calling card on the night when everyone was watching, open-mouthed. Götze is gone; it is inevitable that the attention of Europe's richest clubs will now turn to Lewandowski, although on this performance they could turn to four or five players. Marco Reus, in particular, was exceptional. So too Ilkay Gündogan. Manchester United already bid for Lewandowski last summer and others will surely clamour for the 24-year-old this year.
Bayern Munich have spoken to him and agreed the basis of a deal on personal terms. But Dortmund have already lost Götze and they are determined not to let Lewandowski go to the same club. He has a year left on his contract, so eventually they may have no choice, but they insist that they would rather keep him. The other option, rather more palatable than him joining Bayern, is to negotiate with a foreign suitor. Premiership clubs are monitoring movements.
There was a kind of childish giggle when Klopp, who had already announced that he would not be leaving the club in the summer, concluded a long eulogy of Lewandowski by adding the very best thing about him: "And he is staying!" Yet he sounded less convinced when he spoke to the German TV channel ZDF. "I don't get the feeling that Robert is on the run," he said. "[But] we'll just have to wait and see what happens."
Dortmund's general manager, Hans-Joachim Watzke, said he was determined to keep Lewandowski for another year, despite the risk of him then leaving on a free. "Our wish is explicit that he stays here. We will even do without receiving a transfer fee for him – that doesn't interest us in the slightest," he told Sky Germany. "Robert's contract runs until 2014 and, unlike Mario Götze, there is no get-out clause."
Lewandowski cost them only €4m from Poznan and Dortmund's model is based on selling players for a profit. Departures are normal and success speeds up the process. "You know you have to handle that because the better you get the more the other teams want your players," Klopp explained. "You cannot be successful and have nobody recognise it. Every year we lost one brilliant player and we get better and better and better. It is not true that it will always go this way but it is the only chance we have to try to take the next step.
"It is no problem in the team because we all know that we have to concentrate on the next match and not think about next year and things like that. It's not easy and it's not normal but it is the mentality of the team to enjoy each day that we are together and then we will see at the end of the season."
As for Lewandowski himself, he would not discuss his future after the game. Like Klopp, he preferred to enjoy the moment. This was not the time for transfer talk. It was time instead to talk about his extraordinary feat.
Or perhaps it was not so extraordinary. "I also scored four goals in a game once," Klopp laughed. But were they as good as Lewandowski's? "One of them was similar," he joked. "I am sure that if you look it up on the world wide web you will be able to find it.
"But, seriously, Robert has quality. He is exceptional [because of] his mentality, his fitness, the way he thinks about football, how cool he is. I remember one of his most special goals was in the 94th minute in Amsterdam against Ajax. In his position, most players would take the first option or the second option, but he took the third that no one would think of and it was the best. He is a fantastic player ... and he's staying!"