Portsmouth boss Paul Cook has admitted concerns over his side's poor away form following a "flat" defeat by Blackpool.
Pompey lost 3-1 at Bloomfield Road in a second successive away defeat as they failed to build on an impressive 5-1 home win against Barnet on Saturday.
"Away from home, you can't offer yourselves up like we're doing," Cook told BBC Radio Solent.
"All the good habits that you're supposed to have in the game, such as work ethic and desire, weren't there."
Defeat meant Pompey missed out on the chance to stay in touch with leaders Plymouth, who are five points clear at the top of the table after their 2-0 at Leyton Orient.
Portsmouth also slipped out of the top three on goal difference behind Doncaster, who they face at Fratton Park on Saturday.
"The same players who've left us so high on Saturday, have left us feeling so flat on Tuesday," Cook said.
"The reality of the game is, if we keep doing what we're doing there won't be an issue.
"Over the 14 months I've been in charge, there's always been responses, so I'm not so concerned about Doncaster on Saturday, irrespective of whether we win or lose.
"I'm more concerned about the away form and how we're playing away."