Sporting Lisbon sign Eintracht Frankfurt striker Luc Castaignos

Sporting Lisbon have signed Luc Castaignos from Eintracht Frankfurt on a three-year contract with the option for a fourth.

Castaignos, 23, moves to Portugal after one season in Germany in which he scored four goals in 16 Bundesliga outings.

Sporting have put a €60 million release clause in the striker's contract.

The former Netherlands under-21 international follows countryman Bas Dost in joining Sporting after he moved from Wolfsburg on Sunday.

After a relegation battle in Germany last season the pair now have Champions League football to look forward to. Sporting were drawn in a group alongside Borussia Dortmund, Legia Warsaw and European champions Real Madrid.