Arsenal clearly underestimated Sporting in the first half, so they settled for only a draw, especially in that match Arsenal had a lot of mistakes in defense, and the goalkeeper did not play too reliably. Still, at home Arsenal have to win rather than try their luck in a penalty shootout.
Of course, Sporting is a pretty tough team with a rich history in the European competitions, but the squad is clearly inferior to Arsenal, who are having a great season.
Prediction: Arsenal to win. We recommend the “1 Win” bet, odds 1.41