Arsenal who played away against PSV, but Arsenal is still the team that is projected to win but indeed, it might be a reasonable odds too. Because basically PSV also qualified through the play off round, so maybe that makes Arsenal have better preparation. But maybe also, that factor is not entirely promising for the teams that managed to finish in the top 8 will be able  to advance to the quarter-finals easily. Because of course, Arsenal's situation is also not entirely good, so maybe that makes PSV able to play with their best efforts to get good results in this first leg which is played at Philips Stadion, PSV's home ground.