Watford have completed the signing of Dodi Lukebakio from Anderlecht with Didier Ndong set to arrive on loan from Sunderland, according to Sky sources.
Lukabakio, 20, arrives from Anderlecht having spent this season on loan at Charleroi, signing a four-and-a-half-year contract at Vicarage Road.
The Belgium U21 international scored three goals in 20 appearances so far this term in the Belgian First Division.
Sky Sports News understands Watford are also set to sign Gabon midfielder Ndong on loan from Championship side Sunderland.
Ndong, 23, is expected to join the Hornets until the end of the season with Javi Gracia’s side having the option to make the deal permanent at the end of the season.
Watford completed the loan signing of Barcelona winger Gerard Deulofeu earlier this week.
Recently-installed manager Gracia will take charge of his first Premier League game at Watford when they travel to Stoke on Wednesday evening.
Sky Sports News understands Troy Deeney is likely to remain at the club as he has travelled to Stoke with the rest of the Watford squad – despite an approach from West Brom.
Meanwhile, Isaac Success is likely to go out on loan with interest from the Championship and La Liga club Malaga.