Chong's knee injury looks serious and he could be set for a lengthy spell on the sidelines.
Akpom will spend the rest of the season at Brighton after failing to break into the Arsenal first-team.
Tottenham beat Sunderland 1-0 in the reverse fixture.
Arsenal beat Watford 3-1 in the reverse fixture.
Mason will now continue his recovery and early stages of rehabilitation at home, the club confirms.
Hornets visit the Emirates Stadium following a 1-0 defeat to Millwall.
Lincoln City are rewarded for their own giant-killing exploits with a trip to Burnley.
French playmaker addressed controversial departure during his Marseille unveiling on Monday.
Former Barcelona star spoke exclusively to IBTimes UK after 4-0 win over Brentford.
England international could return to the bench despite scoring a brace against Southampton.
Andres Iniesta and Sergio Busquets remain a doubt for the clash with Los Colchoneros.
Manchester United manager reiterates his refusal to criticise anyone who does decide to make the move.
Darron Gibson and Bryan Oviedo to be reunited with former Everton boss.
Spurs boss believes chances of a January signing are less than 1% heading into final hours of trading.
Italian has yet to decide if duo will feature in the squad for Tuesday's deadline day trip to Liverpool.
Zinedine Zidane's faith in Karim Benzema could see the Spain striker lose patience.
Serena won her 23rd grand slam singles title, beating her sister Venus in the final at the Australian Open.
The Liverpool forward is expected back on Merseyside tonight.
Eagles boss has also admitted an interest in former Juventus defender Martin Caceres.
Los Blancos visit Celta Vigo at the weekend following 3-0 win over Real Sociedad.
Baggies are not interested in Branislav Ivanovic, however.
Arsene Wenger has no plans to make any late January signings but two players could leave.
Liverpool have lost three consecutive home games ahead of Chelsea's visit to Anfield.
Ivanovic, 32, has made over 350 appearances for Chelsea.
The France international has not played for the club all season.
Spurs set to shuffle their pack once again for the trip to the Stadium of Light.
Payet completed a £25m move back to Marseille on 29 January.
Spurs needed an injury-time winner to see off the League Two side.
Smoke seen rising from South Stand on Sir Matt Busby Way.
Reds unlikely to make any signings on deadline day.