Soccer fans get a Tuesday afternoon treat when Paris Saint-Germain hosts Real Madrid in the Champions League round of 16 at 2:45 p.m. ET. PSG is favored by half-a-goal, unchanged from the opening line. PSG is even on the money line, meaning you'd wager $100 to win $100. The Over-Under, or total number of goals oddsmakers think will be scored, is 3.5, unchanged from the open.

Before you bet PSG vs. Real Madrid, you need to see what renowned European soccer expert David Sumpter has to say.

Sumpter is an applied mathematician who wrote "Soccermatics," the book that shows how math works inside the game. Together with experienced analysts, Professor Sumpter developed the powerful Soccerbot model.

Sumpter's Soccerbot reads current odds and all team performance data, calculates key metrics and predicts upcoming matches. In the two-and-a-half seasons since it was born, the Soccerbot is up 1,800 percent on bookmakers' closing odds. That's right -- 1,800 percent.

Now, he has set his sights on the Champions League fixture between Real Madrid and PSG and his picks are in.

Sumpter is leaning towards the total going Under, but what about betting the money line and against the spread?

Sumpter knows PSG has a tough hill to climb if they want to advance to the next round of the Champions League.

Real Madrid was able to fight back after going down 1-0 and pull out a 3-1 victory at the Bernabeu. Cristiano Ronaldo scored a brace in Los Blancos' home victory and will be the focal point of their attack again in Paris.

Meanwhile, PSG enters this highly anticipated contest having won nine of its past 10 matches across all competitions. However, they will be without Neymar, the Brazilian superstar who suffered an injury that will cause him to miss this clash.

But just because PSG will be without one of its most experienced players doesn't mean it won't cover the spread at Parc de Princes.

PSG has won each of its 19 matches at home across all competitions this year, while Real Madrid is fresh off a 1-0 defeat at Espanyol.

So which side should you back in the PSG-Real Madrid game on Tuesday? Visit SportsLine now to see which side of PSG-Real Madrid you need to be all over, all from an expert whose model has made an incredible 1800 percent return on the bookmakers' closing odds, and find out.