Denmark, one of the sleeper picks to win the tournament, settled for a 0-0 draw with Tunisia in their first game in Group D. It was the first scoreless draw of the tournament and only the second draw -- after the U.S.-Wales on Monday.

The Danes are ranked 10th in the world, while Tunisia is ranked 30th.

Denmark held its collective breath in the 93rd minute when the referee was called over to look at VAR for a hand ball, but the ruling came back with no penalty.

When the 2022 World Cup made its debut on Sunday, it kicked off one of the most significant in-game uses of technology in sports history.

All tournament long, match balls will contain a sensor that collects spatial positioning data in real time -- the first World Cup to employ such a ball-tracking mechanism. This, combined with existing optical tracking tools, will make VAR (video assistant referees) and programs like offside reviews more accurate and streamlined than they’ve ever been.

Combining these two forms of tracking has long been a holy grail of sorts in technology circles, and FIFA’s use of the ball sensor in particular will serve as a highly public test case over the next four weeks.

For more on the technology and how it will affect the World Cup, read FiveThirtyEight's in-depth investigation.

With millions of dollars in unused beer sitting in Qatar, the company AB InBev says it will be bringing the beer to the winning country for an "ultimate" celebration.

"Where there is a celebration, there is always a Budweiser. In that spirit, Budweiser wants to bring this celebration from the FIFA World Cup stadiums to the winning country’s fans," the company said in a statement. "We will host the ultimate championship celebration for the winning country. Because, for the winning fans, they’ve taken the world. More details will be shared when we get closer to the finals."

Lionel Messi and Argentina were stunned by Saudi Arabia on Tuesday as the Saudis rallied to beat one of the tournament's favorites, 2-1.

Messi, one of the sport's all-time greats, scored in the 10th minute on a penalty kick. But Saudi Arabia came out strong in the second half with goals in the 48th minute by Saleh Al-Shehri and in the 53rd minute by Salem Al-Dawsari.

Argentina is currently third in the FIFA world rankings, while Saudi Arabia is 51st.

Brazil and Portugal, two of the favorites to win the World Cup, are already into the knockout stage, but they'll have a chance to tune up for the second round in their final group matches on Friday.

In Group G, Brazil faces Cameroon, which needs to win and get a loss from Switzerland to qualify or a draw and better goal differential than the Swiss. Switzerland is facing off with Serbia. Serbia would need to win and get a loss by Cameroon or have a better goal differential. The Swiss just need a win or draw to advance alongside Brazil.

In the other set of games Friday, Portugal faces off with South Korea and Uruguay faces Ghana. Portugal may rest its top players, including Cristiano Ronaldo, so South Korea will be looking to take advantage and grab an upset win. Tottenham star Son Heung-min and South Korea need to win and get a loss from Ghana, or, if that game ends in a draw, beat Ghana in goal differential.

Uruguay, sitting on 1 point just like Korea, needs a similar situation. They'll need to beat Ghana and get a loss from South Korea, or beat Korea out on goal differential if the Portugal-South Korea match ends in a draw.

Here's the schedule for Friday, the final day of group play: