The second leg of the UEFA Champions League round of 16 gets underway on Tuesday when Borussia Dortmund hosts Tottenham and Ajax visits Real Madrid. Both games begin at 3 p.m. ET. 

Oddsmakers list Real Madrid at -165 odds to win (risk $165 to win $100), while Ajax is going off at +400 (risk $100 to win $400). The draw is +330, and the Over-Under for total goals scored is 3.5. Meanwhile, Borussia Dortmund is a slight money line favorite at -110, while the Over-Under is 3. 

With so much at stake in both matches, you need to see what European football expert David Sumpter has to say.

Sumpter is an applied mathematician and author of "Soccermatics," a book that explains how math works inside the sport. Along with other experienced analysts, Sumpter developed the powerful Soccerbot model.

The Soccerbot reads current odds and all team performance data, calculates key metrics and predicts upcoming matches. In the three seasons since its inception, Soccerbot is up an incredible 2,000 percent on Premier League picks. That's right -- 2,000 percent!

And the model is off to a blistering start in the Champions League round of 16. It made some huge calls during the first leg, which included Paris Saint-Germain (+205) over Manchester United, AS Roma (-100) over FC Porto, Tottenham (+110) over Borussia Dortmund and Real Madrid (-120) over Ajax. Anyone who has followed it is up BIG.

Now, Sumpter has set his sights on Tuesday's round of 16 matches. We can tell you the model is leaning toward the Under in Real Madrid vs. Ajax, but its much stronger play is on the money line, saying one side has all the value. You ABSOLUTELY need to see it before locking in any picks.

So which two sides should you back on Tuesday? And where does all the betting value lie?... Join SportsLine now to get Sumpter's Champions League picks, all from the model that's returned a 2,000 percent profit on the bookmakers' closing odds!