The Netherlands international continues to be sidelined with a groin injury while the Manchester United captain is still recovering from concussion
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|15/8||Manchester United are 15/8 with Paddy Power to beat Bayer Leverkusen on Wednesday|
"Robin isn't quite ready yet,” Moyes told reporters.
"It's not long-term, but we're going to keep monitoring him."
United captain Nemanja Vidic was also absent on Sunday as he continued to recover from the concussion he suffered during the 1-0 victory over Arsenal before the international break, and the Serb has been ruled out of the fixture against the German side.
"We just want to give every opportunity to Vida [to recover from concussion]," Moyes added.
A win for United over Leverkusen would ensure their qualification for the knockout stage.