45 matches unbeaten
New Zealand - 17 unbeaten
AC Milan is the team in the Serie A that has the longest unbeaten run of 59 games.
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
The longest unbeaten run as a coach was by Arsenal manager Arsene Wenger for 42 games and over a year. undefeated.
Spain and Brazil had 35 games unbeaten each. As of 06.28.10, Netherlands has a 21 game unbeaten run
It is Brazil.
The whole season
The answer is Arsenal FC
The longest unbeaten run for Newcastle United Football Club is 11 games. This streak took place between August 15, 1992, and December 24, 1992.