"I don't know. It depends on our evolution but also the evolution of others", he said, speaking ahead of Saturday's home match against bottom club Fulham.
José Mourinho has said that Fred, his sole marquee summer signing, will struggle for selection until Manchester United are "defensively stronger".
The 25-year-old was nearly ever-present last season before playing a key role in Belgium's successful World Cup campaign, but Mourinho rejected a suggestion that his problems in front of goal could be put down to tiredness.More news: Eiffel Tower to close Saturday over planned protests in Paris
"We just need to put the performances together as we have the quality to beat teams, which is easy to say but can be hard sometimes".
And UOL Esporte claim United players have been left SHOCKED by Mourinho's treatment of the player.
The Brazilian cost £50m but has been dropped by the manager, with the midfielder not in the 18-man squad for Wednesday's 2-2 draw with Arsenal at Old Trafford.More news: Nation says goodbye to Bush: 'To us, he was close to perfect'
The Red Devils are now eighth in the Premier League table and are without a win in their last four league games.
Arsenal have only kept two clean sheets in the Premier League all season, with their most recent one coming in the club's 2-0 win over Watford in September.
'We want to be further away from our box when the opposition has the ball, ' Emery said.
"The game is not going to be 11 against zero, it's going to be 11 against 11".More news: China vows quick action on USA trade promises: 'The sooner the better'
"The fans want to see us win as much as we want to win for them", Rashford added.