Summary

First round
The format of the 1990 competition remained the same as in 1986: 24 qualified teams were divided into six groups of four. The top two teams and four best third place finishers from the six groups advanced to the knockout stage.
The 1990 World Cup finals got off to a surprising start. In the first match, Cameroon soaked up pressure from Argentina for most of the first half. After a quarter of an hour's play in the second half, Cameroon's Andre Kana was sent off, and it seemed certain that the world champions would now take control. But six minutes later, the ten men took the lead. François Omam Biyik scored when he placed a perfect downward header past Argentine goalkeeper Nery Pumpido. Argentina pressed hard for an equaliser, and Cameroon were reduced to nine men when Benjamin Massing got the red card in the 89th minute - but the African team still held out for a shock 1-0 win. Then, when Cameroon faced Romania in their second game, Roger Milla took centre stage. His inclusion in Cameroon's squad had been controversial. He had been a favourite in the Cameroon team for years, but he was now 38 years old. He was only in Italy because of political intervention: Paul Biya, Cameroon's President, had insisted that Milla be included in the squad.
Against Argentina, Milla only appeared for the last ten minutes. But in the match with Romania, Cameroon coach Valeri Nepomniachi sent him on in the 58th minute, with the score still 0-0. It proved to be an inspired move. Milla scored with 15 minutes left, then added another with five minutes remaining, thus getting two opportunities to demonstrate his trademark hip-shaking goal celebration dance. Gavrila Balint scored for Romania, but it was too little too late. Cameroon held on to win 2-1. Surprisingly, they were beaten 4-0 in their last group game by a Soviet Union side desperately, and unsuccessfully, striving to stay in the tournament on goal difference. Despite the heavy defeat, Cameroon were through to the second round as group winners. Romania came second in Group B, and Argentina just scraped into the second round as one of the best third-placed teams.
Another surprise team emerged from Group C. Costa Rica beat Scotland 1-0 in their first match, held Brazil to another 1-0 scoreline in their second, then saw off Sweden 2-1 to claim a place in the second round. Brazil bore little resemblance to the free-flowing, free scoring Brazilian sides of earlier years, but they still took maximum points from the group. They began with a 2-1 win over Sweden, then beat both Costa Rica and Scotland 1-0. Scotland's 2-1 win over Sweden was not enough to save them from an early return home as one of the two lowest-ranked third-placed teams.
In the six Group F games, featuring the Netherlands, England, the Republic of Ireland and Egypt, no team managed to score more than once in a match. England beat Egypt 1-0, thanks to a 64th minute goal from Mark Wright - and that was enough to win the group.
There were more goals in Group D, but a lot of them were due to the defensive inadequacies of a United Arab Emirates team that lost 2-0 to Colombia, 5-1 to West Germany and 4-1 to Yugoslavia. All three of the UAE's first round opponents reached the last 16, with West Germany topping the group after an impressive 4-1 win over group runners-up Yugoslavia.
Italy won Group A with a 100 per cent record achieved via cautious football. They beat Austria and the United States 1-0, and Czechoslovakia 2-0. Salvatore 'Toto' Schillaci, who had played only one international before the World Cup finals, came on as substitute in the 74th minute against Austria and scored Italy's winner four minutes later. Czechoslovakia defeated the USA 5-1 and claimed the runner-up spot in the group, while the USA's first appearance in a World Cup Finals since 1950 ended abruptly after three consecutive defeats. The winners of Group E were Spain, for who Michel hit a hat-trick as they beat South Korea 3-1. Belgium and Uruguay also reached the last 16 from the same group.