Manchester United could sign 37-year-old Polish international Robert Lewandowski on a free transfer next summer, according to the Daily Star. The striker is in the final year of his Barcelona contract, and Fabrizio Romano has reported that there are indications of a departure. Lewandowski, who has no intention of retiring, could join the club over a decade after he previously agreed to a move while Sir Alex Ferguson was in charge. He told BBC Sport earlier this year that he had said yes to joining Manchester United during his time at Borussia Dortmund, but the German club would not sell him because they believed they could earn more money by keeping him. The club is reportedly exploring the market for an experienced striker. The striker has 87 goals in 161 caps for Poland. His current market value is €10.00m, according to Transfermarkt. Other clubs, including Atlético Madrid and Milan, have also been linked with a potential move.