Two players who are eligible to represent Ghana at senior level were on target for their respective clubs as Salzburg Under 19 defeated Lyon U19 by four goals to three on Wednesday.
Duku, who was born to Ghanaian and Cameroonian parents shot Lyon ahead with a cool finish in the 30th minute before Okoh, who is also Ghanaian and Nigerian parentage restored parity in the 40th minute with a superb effort.
Chukwubuike Adamu netted a hat-trick for Salzburg to make it four before Da Silva and Eli Wissa scored two more goals to end the game 4-3.
Salzburg Under 19 have been a dominant force in European youth football in recent years producing lots of quality players which includes Ghanaian defender Gideon Mensah.
