Lewandowski scored and produced an assist during Barcelona 4-0 win over Atletico Bilbao in La Liga.
Dembélé opened the floodgates after 12 minutes from a header following a brilliant assist from Lewandowski.
Roberto added the second goal in the 18th minute, before the Poland striker turned from a provider to a scorer adding the third for his side, before Torres made it 4-0 in the 73rd minute.
Real are top on 31 points from 11 games, while Barcelona have 28 points.