More often than not, Moyes has opted to select just one of the attackers in his starting lineup, with top goalscorer Arnautovic being preferred by Moyes in the majority of matches.
However, Hernandez is back in contention having come off the bench to net against Chelsea last weekend, and Moyes has admitted that he is delighted to have competition for places in the final third.
At a press conference, the 54-year-old told reporters: "It's great we have got competition, it's something we have not had an awful lot of this season.
"To have it for places, options and choices, we have played them together where it has not been so good and also in other games where it has been good. So we will make our decision and decide if this is a game for both of them or one of them."