Ten-men Arsenal held on to beat Swansea City 3-2 at the weekend.
Armenian has failed to impress since moving to Old Trafford during the summer.
Arsenal are on a six game winning run in the league.
Henderson is bullish about his side's chances of beating United.
Senegal international switched to Anfield during the summer transfer window.
Spanish playmaker spoke to IBTimes UK after his side's 3-2 victory over Swansea City.
Real looking for eighth consecutive European win at Santiago Bernabeu.
Spanish duo missed the 4-0 win over Deportivo la Coruna due to injury.
Former England international believes Jose Mourinho has not been ruthless enough at Old Trafford.
Alderweireld hurt his knee in Spurs' 1-1 draw at The Hawthorns.
Georginio Wijnaldum and Adam Lallana are both recovering from knocks.
Liverpool host Manchester United at Anfield on Monday.
Oxlade-Chamberlain has started only in 52 Premier League matches since joining Arsenal in 2011.
Harry Kane will be back in training this week.
Mourinho is yet to decide between Fellaini and Herrera for defensive midfield role for Liverpool trip.
Johnstone joined Manchester United when he was 10 years old.
Liverpool and Manchester United clash against each other in the Premier League fixture on 17 October.
United boss says Anthony Taylor might be under 'too much pressure' against Liverpool.
Taylor will be the referee for the Liverpool vs Manchester United game scheduled for 17 October.
Mesut Ozil scored his third goal of the season during Arsenal's 3-2 win over Swansea.
Liverpool are on a four-game winning streak in the league.
Theo Walcott has already scored five goals this season in the league.
Gunners secured their sixth Premier League game in a row, despite playing 10 men for the final 20 minutes.
American manager saw his side losing at the Emirates Stadium in his first game in charge.
Mane has scored three goals since the start of the league.
Diego Costa is the Premier League's top scorer with seven goals in eight games.
Liverpool will go joint top of the league should they win against Manchester United.
Toby Alderweireld was stretchered off 15 minutes into the second-half.
Tottenham maintain unbeaten run but settle for point at West Brom.
Record-breaking forward has been dropped by club and country in recent weeks.