Manchester United and Manchester City shared a first goalless draw in three years at Old Trafford.
In a cagey match of few clear-cut chances, United's best in the first half fell to Scott McTominay, who was inches from connecting to a flick at the far post.
For City, Raheem Sterling had a close-range shot blocked by Harry Maguire, while Riyad Mahrez forced a smart save from David De Gea on a breakaway.
Four minutes after the break, United were awarded a penalty when Kyle Walker fouled Marcus Rashford, but it was overturned by VAR for offside in the build-up.
Both sides continued to press for an opener, but their defences were on top, with each side having only one shot on target in the second half.
United are eighth on 20 points, a place and a point above City.
See: Man Utd report | Man City report
Next fixtures
Man Utd: 17 Dec v Sheff Utd (A)
Man City: 15 Dec v West Brom (H)
Match officials
Referee: Chris Kavanagh. Assistants: Lee Betts, Constantine Hatzidakis. Fourth official: Craig Pawson. VAR: Paul Tierney. Assistant VAR: Ian Hussin.
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