Hull City have signed Everton striker Oumar Niasse on loan until the end of the season and Porto midfielder Evandro for an undisclosed fee.
The club are bottom of the Premier League and these are the first signings since Marco Silva replaced Mike Phelan as the Tigers' boss earlier in January.
Senegal international Niasse, 26, joined Everton in a £13.5m deal in February but failed to score for them.
Brazilian Evandro, 30, has played in the Champions League for Porto.
He was managed by Silva when he was in charge of Portuguese side Estoril.