at national team level it is the fifa world cup, which itself is considered to be world's greatest sporting event, even better than the summer Olympics.
at club level it depends on the continent of the club, you see every continent's got a continental championship whose competing teams are the country's champions and/or runner-ups. generally the European competition, known as the uefa champions league is regarded as the most prestigious, with the south American copa libertadores as the second in importance. there's also something called the fifa club world cup, on which competes the winner of these continental cups, and the winner of this cup is dubbed the "world champion", but most people consider the continental cups to be more important and prestigious
Portugal
I think it was Uruguay vs Ghana.
soccer and football
The record for the most goals scored by a single player in a football match is 16, achieved by Stephan Stanis of France in 1942.
17 by Deutio gagerino - Brasil
Liverpool vs Chelsea 1994
9
36
The most popular sport in the world, by a wide margin, is soccer, or "football," as it is called in most of the world. There are soccer stadiums in South America and Europe that hold over 100,000 spectators, and they are packed for every match.
32 australia vs american samoa
36 by a scottish team named Arbroath in 1885
9-0 in pro football, when man u frashed ipswich