Andre Ayew is confident Olympique Marseille can cause a major upset and dump Manchester United out of the European Champions League on Tuesday night.Ayew and his Marseille team mates go into the tie at Old Trafford with the aggregate score at 0-0 and believes the French side have laid the foundation for progress in the competition. "It will be a tough game as most clubs who go to that stadium have learnt," Ayew told KickOffGhana.com."We have nothing to lose and we know an away goal will make a major difference. We just have to believe and give it our all." Ayew has been key for Marseille this season, scoring goals and making them in equal measure. Against United he battled hard on the left flank reducing the effectiveness of their Portuguese winger Nani in the process. He even earned orates for the effort he put in that night but nothing will beat getting into the next stage at their expense. The first leg was hard work but the second leg will be even more difficult. The motivation to get the better of them is so huge.Source: Kickoff.com