Moyes is ready to take a selection gamble for the must-win game at Old Trafford with Wednesday's trip to Arsenal on the horizon.
The United manager admitted: "We've got two big games coming up, a big one on Wednesday, too, and have to take that into consideration. I must say I thought we played quite well last week [in a 2-1 defeat at Stoke] and I hope it continues.
"Juan has played well in the games so far and has contributed well. It was the first time we had Robin and Wayne playing together since the start of the season and if we see more of that between now and the end of the season, it will hopefully lead to better performances and more points."