David Healy says Linfield's first-half display against Cliftonville fell short of the standards expected from his players.
The Blues fell to a 1-0 defeat at Solitude on Tuesday night, Ronan Doherty's 11th-minute goal earning the Reds maximum points in North Belfast.
It has also sent Paddy McLaughlin's side three points clear at the top of the Irish Premiership, and five ahead of Healy's Linfield.
