Gyokeres, who is 6ft 2in, managed 39, though the Primeira Liga is not considered one of the top five leagues in Europe. The question is whether Gyokeres he can be prolific in a stronger league. He has just turned 27 and is yet to play in Europe's top five divisions - hence Ferdinand's comments.

Over the last three seasons, the Premier League champs have had an attacker score an average of 30 league goals

Financial details on the transfer were not disclosed but British media reported Arsenal agreed to pay 55 million pounds fixed upfront fee plus around 8 million pounds in add-ons for the 27-year-old.