Leicester City and Tottenham Hotspur are set to play in the Champions League next season.
Alan Pardew's men have slid right down the Premier League table since the turn of the year.
Merson believes a striker and new manager will not be enough to solve Manchester United's deficiencies.
The Reds have been inconsistent during the former Borussia Dortmund boss' time in charge.
The Gunners have relied heavily on Olivier Giroud this season.
The Frenchman is under increasing pressure at the Emirates.
The Gunners were 2-0 winners over Everton on Saturday, and followed that with the usual celebratory pictures.
Former Arsenal man predicts Tottenham will beat Leicester to winning the Premier League.
Tottenham Hotspur beat Bournemouth 3-0 on Sunday afternoon.
Newcastle United and Stoke City are among the clubs to have enquired about signing Michy Batshuayi, with West Ham also keen.
Brighton & Hove Albion defeated Leeds United at Elland Road in the Championship on Saturday afternoon.
Queens Park Rangers suffered a 2-1 defeat to Birmingham City away from home in the Championship on Saturday.
Sunderland suffered a 1-0 defeat to West Bromwich Albion in the Premier League on Saturday.