Diego Maradona on Monday backed controversial plans to expand the World Cup to 48 teams, a day before world football's powerful governing council faces a key decision on the issue.
"It sounds like a fantastic idea to me," the 56-year-old, who inspired Argentina to World Cup glory in 1986, told reporters at FIFA's Zurich headquarters.
"This will give more possibilities to countries that have never reached that level of competition."
FIFA president Gianni Infantino, who took charge of the scandal-tainted world body last year, has made expanding the World Cup from the current 32 teams the centrepiece of his administration.
But his plans have faced criticism including warnings that it will dilute the quality at football's showcase event.
"The quality will not fall," said Maradona, dripping with sweat after rumbling his way through a mini tournament of former football greats and current executives.
Infantino has been courting support from the game's most powerful figures ahead of Tuesday's meeting.
Among those playing on the snow-lined pitch Monday was UEFA boss Aleksander Ceferin, who has voiced scepticism towards expansion, and CONCACAF chief Victor Montagliani, who is open to a bigger tournament.
Former French international David Trezeguet said more World Cup berths could give "possibilities to countries and especially players who have never experienced this beautiful competition", while acknowledging that details still needed to be worked out.
Among the major concerns from critics is that a longer tournament would increase pressure on an already strained club schedule.
The influential European Clubs Association, led by German great Karl-Heinz Rummenigge, has come out against an enlarged World cup, citing football's overloaded calendar.