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Another week of 2020 Tokyo Olympics action will reach its midpoint soon, and there's still plenty to get excited about. The United States's women's basketball team is looking to win its seventh straight gold medal. That journey could come to an end if the Americans don't beat Australia on Wednesday. The Opals have already secured an upset against the world's top team in an exhibition setting while missing a key piece, and they'll look to do so again to keep their gold medal hopes alive.

The latest 2020 Olympics odds from Caesars Sportsbook list the United States as a 14.5-point favorite and the over-under is set at 160 in that matchup. Baseball, women's golf and plenty of track and field events are among the other sports on the Olympic schedule for Tuesday evening and early Wednesday. Before locking in any 2020 Tokyo Olympics picks or predictions for those events or others, you need to see what SportsLine Olympics expert Mike Tierney is saying.

A national sportswriter whose work appears in The New York Times and Los Angeles Times, Tierney has covered nine Olympic Games in person. In the past two Olympic Games, his advice helped those who followed him cash in big, and he already has nailed a huge winner at Tokyo 2020.

Tierney kicked off his Olympics 2020 picks by taking Norway's Kristian Blummenfelt (+600) as his pick to win gold in Sunday's men's triathlon, and the 27-year-old ran away with the event. He also picked Chinese legend Long Ma (+163) to win the men's table tennis final over ITTF world No. 1 Fan Zhendong and called Japan (+100), upsetting Team USA in the softball final.

At the Pyeongchang Winter Olympics in 2018, he nailed Suzanne Schulting (+2500) of the Netherlands and Norway's Havard Lorentzen (+800) to triumph in speed skating and the USA's Mikaela Shiffrin (+185) to win the giant slalom. Tierney also took the under (10.5) on the Americans' gold-medal count, and that also cashed as the USA came in with nine.

And at the Rio 2016 Summer Games, Tierney told readers to bet over on Team USA's gold medal count (41.5) and over on Team USA's overall medal count (102.5). The result? 46 golds, 121 medals and two easy cashes. Anyone who followed Tierney's advice cashed in huge.

Now, Tierney has been studying the 2020 Tokyo Olympics event schedule and digging down into individual and team sports. He has released three confident Olympic best bets for Tuesday. He's only sharing his expert Olympics 2020 picks at SportsLine.

Top 2020 Tokyo Olympics predictions

One giveaway: The United States is a massive 14.5-point favorite ahead of its Wednesday matchup against Australia, but Tierney doesn't think the Americans will run up the score against the underdogs in a barn burner. He's leaning under on the game's point total of 160. The world's top women's team has failed to cover the spread in three straight games despite its 3-0 record. 

The United States has secured double-digit wins in two of its three games while winning by an average of 11 points, but second-ranked Australia has five WNBA players at its disposal and topped the United States in an exhibition earlier this year. The Opals held the United States to 67 points in Las Vegas, Nevada, in July. That was without Liz Cambage protecting the rim. If Australia can force tons of turnovers in this rematch, it can keep the score low.

How to make 2020 Tokyo Olympics picks

Tierney also has a strong play on the Team USA vs. Australia spread in women's basketball, as well as a pair of other best bets that each return more than 3-1. He's only sharing his Olympics 2020 picks at SportsLine.

What are the best bets you can make for Tuesday and Wednesday Olympic action? And which huge underdogs should you be all over? Visit SportsLine now to get Mike Tierney's best bets for the Tokyo Summer Olympics, all from the renowned sportswriter who's covered nine Olympics in person and cashed big in both 2016 and '18, and find out.