Double · two matches: SSC Napoli — Arsenal FC · FC Barcelona — Feyenoord Rotterdam

The first match in the parlay is SSC Napoli against Arsenal FC. The expected score according to the model is 1.5 : 1.5 goals, which gives us a total of around 3. This corresponds to a bet on under 3 (U3) with odds of 1.57. Napoli has shown unstable form in recent games: two wins and three losses, averaging 2 goals scored and 1.3 conceded. Interestingly, both teams have scored in 75% of Napoli's matches, but in their recent encounters with Arsenal, they have not managed to score more than two goals.

Arsenal, on the other hand, is on the rise: the team has won all of its last five matches, scoring 10 goals and conceding only one. Considering that Arsenal has not lost any matches in the Champions League this season and is showing a high level of play, we can expect a cautious approach from both sides in this match. It’s also worth noting that Napoli has squad issues: key players like André-Frank Zambo Anguissa are missing.

The second match is FC Barcelona against Feyenoord Rotterdam. The expected score here is 1.5 : 1.8 goals, with a total of around 3.3. A bet on Barcelona's individual total over 2.5 (O2.5) looks logical with odds of 1.61. Barcelona is currently in excellent form: the team has won all of its last five matches with an overall score of 19-6 and averages almost 4 goals per game.

Feyenoord is also performing well, but their defense concedes about 1 goal per match in recent games. Given Barcelona's high attacking power and their ability to score first (67% of the time), we can expect an active start from the home side.

In conclusion, we take a parlay of two bets: Under 3 (U3) for the Napoli vs Arsenal match and Barcelona's individual total over 2.5 (O2.5) for the match against Feyenoord with a total odds of 2.53.