Arsenal maintained their unbeaten start to the Europa League with a 1-0 win at Bodo/Glimt, while Manchester United came from behind to beat Omonia Nicosia.
Saka scored midway through the first half in Norway to give Arsenal their third Group A victory in a row.
Arsenal leads PSV Eindhoven by two points after a 5-0 thrashing of FC Zurich. Bodo and Glimt have four points after four games.
Scott McTominay’s 93rd-minute goal saved United’s blushes in a 1-0 victory over Cypriots Omonia at Old Trafford.
Omonia goalkeeper Francis Uzoho made several excellent saves to frustrate a wasteful United before the Scotland midfielder scored in stoppage time.
“You must be patient at times. Their goalkeeper was of a different calibre, but we created enough chances and deserved to win “McTominay stated to BT Sport.
“We need to win the group, so it’s a huge goal.”
Erik ten Hag’s side remained three points behind Group E leaders Real Sociedad, who defeated 10-man Sheriff Tiraspol 3-0 for their fourth consecutive victory.
La Real are certain to advance. They play United on November 3 in a match that will most likely determine which team advances directly to the last 16.
In a knockout round play-off in February, each of the eight group runners-up will face a team that has been relegated from the Champions League.
Betis loses its unblemished record
Real Betis dropped their first points of the competition after a 1-1 draw at home to Roma in Group C, missing out on a place in the last 16.
On 34 minutes, Sergio Canales put Betis ahead, but Andrea Belotti equalised for Roma, who remain third in the section behind Ludogorets. The Bulgarians defeated HJK Helsinki 2-0 at home.
Freiburg won for the fourth time in a row in Group G, piling more misery on Nantes with a 4-0 win away from the French Cup holders.
Both Fenerbahce and Rennes have ensured their progression from Group B. Fenerbahce defeated AEK Larnaca 2-1, while Rennes beat Dynamo Kyiv 1-0 in Krakow.
Union Saint-Gilloise of Belgium must wait to be sure of a place in the last 16 despite coming from two goals down to draw 3-3 with Braga.
Union Berlin resurrected their Group D hopes with a 1-0 victory over Malmo thanks to Robin Knoche’s 89th-minute penalty.
Group F’s four teams are all tied on five points. Lazio drew 2-2 with Sturm Graz at home, while Feyenoord were defeated by Midtjylland by the same scoreline.
Ferencvaros leads Group H by three points after defeating Red Star Belgrade 2-1. Trabzonspor defeated Monaco 4-0 to move up to second place in Ligue 1.
Villarreal qualified for the Europa Conference League last 16 after winning Group C. Nicolas Jackson, a Senegalese midfielder, scored the only goal in their 1-0 victory over Austria Vienna.
West Ham advanced from Group B after defeating Anderlecht 2-1, thanks to goals from Said Benrahma and Jarrod Bowen.
The Hammers only need a point from their final two games to secure first place.