Bolasie has scored nine goals in 89 Premier League games.
Sunderland sign defender Papy Djilobodji from Chelsea.
Gernot Rohr previously coached Gabon, Niger and Burkina Faso.
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
Round of 32
Match 85
Day 83
Switzerland vs Algeria 2:0
Goal Switzerland
B. Embolo (10')
D. Ndoye (46')
Assist Switzerland
J. Manzambi (10')
Algeria
Switzerland