Niasse has never managed to truly convince those on Merseyside and his prospective departure could pave the way for AC Milan forward Andre Silva to arrive at Goodison Park.
Holgate clashed with Firmino after his late tackle pushed him over the advertising hoardings in the first half.
Cenk Tosun officially completed his £27m move from Besiktas to Everton during Friday night's FA Cup third-round defeat to Merseyside rivals Liverpool at Anfield.
The world's most expensive defender, Virgil van Dijk, enjoys a Liverpool debut to remember as his late header settles the 230th edition of the Merseyside derby at Anfield.
Barkley joins for a fee of £15m plus add-ons and has put pen-to-paper on a five-and-a-half-year contract with the Premier League champions.
Arda Turan missed Barcelona's training session on Friday amid growing speculation linking him with a January move away from the Nou Camp.
Blues boss Conte thinks his side have taken advantage of a "good opportunity" in buying Barkley, whose move will be finalised by the end of the week.
Seri was close to a move to Barcelona in the summer but now has designs on a move to the Premier League.
Barkley is out of contract with his boyhood club at the end of the season after rejecting a lucrative extension last year.
Everton manager Sam Allardyce recently confirmed that the Toffees are resigned to losing the 24-year-old, whether it be this month or at the end of the season.
Valencia are expected to end their interest in Everton misfit Sandro Ramirez having completed the signing of Luciano Vietto on loan from Atletico Madrid.
Jones spent the second half of last season on loan at Championship side Barnsley but is now set to leave Merseyside on a permanent transfer.
Everton manager Sam Allardyce admits that the club were resigned to losing contract rebel Ross Barkley before he arrived and does not see that stance changing.
Everton are currently discussing personal terms with Besiktas striker Cenk Tosun, who could be registered in time to face Liverpool in the FA Cup on Friday night.
Turan has not seen one minute of action in Catalonia this season and is searching for a route away from the Spanish league leaders.
Lennon successfully overcame his mental health issues last year and has been utilised heavily by the Toffees in recent months.
Cenk Tosun was linked with a move to Tottenham Hotspur, Everton and Crystal Palace as the player expressed his desire to play in the Premier League.
Mourinho took aim at former United midfielder Paul Scholes following his criticism of Pogba's performance against Southampton.
Sam Allardyce has certainly turned things around at Goodison Park but new signings are still needed to help balance a lop-sided squad.
Besiktas are now demanding in excess of £27m for the Turkey international after Everton came close to agreeing a £25m deal.
Second-half goals from Anthony Martial and Jesse Lingard end Manchester United's run of three successive draws and inflict a second successive defeat on Sam Allardyce's Everton.
Chris Hughton should add to Brighton and Hove Albion's firepower in the January transfer window to avoid relegation.
