World champions Germany remain top of the FIFA rankings published in Lausanne, Switzerland today.Olympic champions Brazil are second in the football rankings with European title-holders Portugal third. Iceland were the only climbers in the top 20, up by two places to 18th. Mexico are the top north and central American team in 17th. Tunisia lead the Africans in 23rd while 33rd-ranked Iran are leading in Asia. World Cup hosts Russia, who have been playing only friendlies for the last two years, are 61st. The top 10 is dominated by Europe with seven teams, while South America provides the other three.