Line Calls, presented by FanDuel: Assessing the ATP Finals after two days of play

All eight players at the ATP Finals have played one round-robin match. As we turn the page to Tuesday, we have already seen some dramatic changes in the FanDuel betting odds. As things stand, the oddsboard currently looks like this:

• Jannik Sinner (-135)
• Alexander Zverev (+380)
• Carlos Alcaraz (+700)
• Taylor Fritz (+850)
• Casper Ruud (14-1)
• Daniil Medvedev (21-1)
• Andrey Rublev (50-1)
• Alex de Minaur (50-1)

Sinner’s dominant win over de Minaur, coupled with Alcaraz’s shocking loss to Ruud as a -2000 favorite, has the Italian as the odds-on favorite to take home the trophy. He and Fritz are the two undefeated players in the Ilie Nastase Group, as the American won his first match against Medvedev. And they'll will clash on Tuesday, so somebody will pick up a crucial win.

⬇️ WATCH: Why you should take Fritz and the games

Meanwhile, Zverev and Ruud sit atop the John Newcombe Group standings, as the German beat Rublev in straight sets and the Norwegian stunned Alcaraz.

When looking at betting the futures market the rest of the way, it’s still hard not to like Sinner. TennisViz and Tennis Data Innovations have Sinner with the highest hard-court Shot Quality in the field on forehands, backhands, serves and returns. He looked sharp in his 6-3, 6-4 win over de Minaur, and he has the comfort of playing this event at home. Sinner also has head-to-head advantages over both Fritz and Medvedev, so he should be able to emerge from group play, at the very least. Once he does, it’s hard to imagine anybody beating him.

Zverev is the other player that looks really dangerous right now. His serve was untouchable in his win over Rublev, and that has also been the case over the last few weeks. The German won the Rolex Paris Masters, beating some tough opponents along the way, and he picked up where he left off in his first match in Turin. Zverev has also won this event twice in his career. So, while he hasn't yet claimed his first major, we know Zverev has the goods when it comes to the year-end event.

⬇️ WATCH: Zverev's value to win is worth considering

However, there are two things that are worth pointing out. The first is that Alcaraz isn’t done just yet. The Spaniard is a -385 favorite to beat Rublev in their match. If he wins that one and beats Zverev, he still has a shot at making the semifinals. And for what it’s worth, Zverev might not play Alcaraz with the same desperation that the Spaniard will have. A win over Ruud would pretty much book the German’s spot in the semifinals, and Zverev is a -435 favorite to win that match. That said, Alcaraz isn’t dead yet. So, jumping on his +700 odds isn't a bad idea considering Alcaraz was second on the oddsboard to start the tournament.

The second thing is that Fritz is looking like a threat in Turin. The American beat Medvedev rather easily in their Sunday encounter, and while he is a pretty sizable underdog against Sinner, he still can make the semifinals by beating de Minaur. The Australian does have a 4-3 record against the American in seven career meetings, but Fritz is arguably a better fast-court player. There’s no better example of that than their meeting in Eastbourne two years ago, when Fritz earned a 6-1, 6-7 (5), 6-3 win on grass. Indoor hard courts could favor him even more. Fritz absolutely loves playing in this event: we saw it in his first appearance two years ago, and he picked back up where he left off on Sunday.

Overall, there are still plenty of ways to get involved in betting this tournament. Backing Sinner at -135 is probably my favorite, but I do expect Zverev to win his group. So, +380 odds aren’t terrible for the German. But there are plenty of other ways to go, and it’s hard to blame anybody for betting on any of these players. That’s the beauty of an event that features the best of the best.