It is unknown which team has the longest unbeaten run in all competitions. Arsenal have the longest English league run with 49 games unbeaten, which included the entire 2003/04 Barclay's Premier League season unbeaten. Chelsea have the longest unbeaten home run in the league with 86 games. Liverpool have the longest unbeaten home run in all competitions with 85 games. The longest unbeaten League run in English Senior Football is held by AFC Wimbledon who went 78 games unbeaten from 22 Feb 2003 to 4 Dec 2004. This included a complete league season undefeated. Steaua Bucharest went 104 matches unbeaten between 1986 and 1989
chelsea 86 matches
AC Milan is the team in the Serie A that has the longest unbeaten run of 59 games.
Real Madrid 121 games
arsenal had an unbeaten run of 49 games May 7, 2003 - October 24, 2004
Arsenal in 2004 The only other team (before the Premier League) to go a whole season unbeaten was Preston North End in 1888-1889.
AFC Wimbledon of the English league went a total of 78 games unbeaten including 1 season winning all the games.
Stoke City Britannia
Spain and Brazil had 35 games unbeaten each. As of 06.28.10, Netherlands has a 21 game unbeaten run
No team has been awarded the Premier League trophy for longer than the season they are champions. The only possible exception was the specially commissioned gold Premier League trophy awarded to Arsenal in the unbeaten season of 2003/04. Most teams commission a replica trophy to be retained in their trophy cabinets.