Premier League strugglers Everton salvaged a 2-2 draw with Tottenham thanks to Jarrad Branthwaite's last-gasp equaliser, while Aston Villa moved into fourth place with a 5-0 demolition of Sheffield United on Saturday
Forest survived a scare to beat third-tier Blackpool 3-2 after extra-time, while Everton were 1-0 winners against Crystal Palace in another of the night's third-round replays.
With Everton and Nottingham Forest currently embroiled in a relegation battle, that would plunge their top-flight status into severe doubt.
Manchester City came from behind to beat Everton 3-1 on their return from the Club World Cup on Wednesday.
Chelsea manager Mauricio Pochettino said his side needs strengthening in the transfer market after a 2-0 defeat at Everton on Sunday
Newcastle were made to pay for two uncharacteristic errors by England international Kieran Trippier as fatigue hit the injury-ravaged Magpies in the closing stages.
Everton face a 12-point deduction after an investigation into alleged breaches of financial rules by the Premier League club
Arsenal finally ended their six-year wait for a Premier League victory at Everton as Leandro Trossard fired the title-chasing Gunners to a 1-0 success.
Aston Villa won for the first time this season as they routed Everton 4-0 on Sunday to erase the bitter taste of last weekend's thrashing at Newcastle
Abdoulaye Doucoure was Everton's hero after the French midfielder smashed home from the edge of the box on 57 minutes to spark jubilant celebrations around Goodison Park.
Everton are the one side in full control of their own fate as victory at home to Bournemouth will extend their stay in the top flight to 70 years
Ilkay Gundogan said Manchester City are showing their experience at the business end of the season after the German scored twice in a 3-0 win on Sunday that kept Everton looking over their shoulders in the relegation battle
Everton moved out of the Premier League relegation zone with a ruthless 5-1 win at Brighton.
Leicester, who have won one of their last 12 league games, moved out of the relegation zone on goal difference.
Jadon Sancho smashed home the opener after just seven minutes before Marcus Rashford turned on the afterburners to race past Eric Dier and fire in his 29th goal of the season.
Harry Kane's penalty looked set to take Tottenham third in the table after Abdoulaye Doucoure had been sent off for striking the Spurs striker in the face.
Tottenham manager Antonio Conte lambasted his players after they let a two-goal lead slip to draw 3-3 at Southampton on Saturday, as Chelsea also conceded a late equaliser in a 2-2 draw with Everton
Gabriel Martinelli starred as Arsenal moved five points clear at the top of the Premier League with a 4-0 rout of struggling Everton on Wednesday.