Jonathan Mensah
The Ghana international, who played at the World Cup in Brazil, spent the second half of last season on loan at French side Valenciennes, where he scored nine goals in 16 games.
Ghana drop Kwarasey and Essien for Nations Cup qualifiers - Ghana coach Kwesi Appiah has named a 24-man squad for next month's 2015 Africa Cup of Nations qualifiers.
The 31-year-old, who played for Ghana in the 2006 and 2010 World Cups, joined as a free agent only 24 hours after his contact with Rayo Vallecano ended.
Sierra Leone have climbed 14 places in the Fifa world rankings for August, lifting them into the top 50 for the fist time in their history.
He made a switch last winter by spending six months on loan at Sochaux, where his five goals in 17 matches could not prevent the club from relegation from the top flight.
The Super Eagles climbed three places in the Confederation of African Football region and 10 spots on the global list - up to 34th in the world.
Portugal vs Ghana 2:1
Germany vs Ghana 2:2
Ghana vs USA 1:2
Ghana lost their opening match against USA. Now it's getting tough for the Black Stars to reach the knockout-phase.
Ghana swept aside South Korea 4:0 in their final World Cup warm-up match as striker Jordan Ayew hit a hat-trick after coming on as a substitute.
Jonathan Mensah