sportsbook went live last Thursday, and reported that there are already some interesting trends to be seen. Baseball being the most bet on sport so far, both in terms of number of bets and amount wagered. When you consider that baseball is the only major U.S. sport currently in regular season and the number of games played daily, this may not be a surprising stat. What the company did find surprising is that tennis, only one day into the US Open, was already the third biggest sport at sportsbook.

"It seems that our sports bettors really started exploring our live in-game offer last night, with both Serena Williams and Rafael Nadal playing prime time at Arthur Ashe Stadium in New York. 70 percent of wagers on tennis are live in-game already," said Mattias Stetz, COO of Rush Street Interactive, the company that operates

Players can choose from a wide range of bet options, sometimes with as many as 60-70 different live in-game options per match. Players can, at any time, bet on the outcome of the match, the current and following sets, every game of every set and even every point of every game. Other exotic bets include whether each set will reach a tiebreaker and also the game spread of each set. aims to offer over 20,000 live in-game bet options for the US Open alone, and players will be able to bet on every point of every match in both the singles and doubles tournaments.

"Live in-game betting is the future of sports betting here in the U.S., and being able to offer interesting bets, even in games that are very one-sided, is something we always strive to offer our bettors," Stetz said.

With the NFL regular season around the corner, is guaranteeing live in-game betting on every game on both the final pre-season games on Thursday and every regular season game, including the playoffs.