Andre Ayew scored 12 goals in 34 games for Swansea in 2015-16.
Ogenyi Onazi joins Trabzonspor from Lazio 'to clear my head'.
Ghana midfielder Kevin-Prince Boateng joins Las Palmas.
Chelsea winger Mohamed Salah signs for Roma on permanent deal.
Jorge Costa had been in charge of Gabon since 2014.
Idrissa Gueye has won 32 caps for Senegal.
Mamelodi Sundowns reach the Champions League semi-final
Champions Etoile du Sahel and Medeama of Ghana secured victories.
Kolo Toure has been in Glasgow for a medical.
Watford sign defender Brice Dja Djedje on four-year deal.
Round of 32
Match 81
Day 22
USA vs Bosnia Herzegovina 2:0
Goals USA
F. Balogun (45')
M. Tillman (82')
Bosnia and Herzegovina
USA