Chiefs and 49ers remain unbeaten - five things from NFL week four

Sunday's slate got under way with the Indianapolis Colts beating the Washington Commanders in the first of this season's three London games.

The New England Patriots and Los Angeles Rams then avoided dropping to a 1-3 record by pulling off some big wins on the road.

The Kansas City Chiefs and Las Vegas Raiders were among the five teams who made a 3-0 start to the season and one team's '0' had to go as the divisional rivals met, while the San Francisco 49ers and Minnesota Vikings marched on.