James Perch is eager for Wigan to confirm their place in the Sky Bet Championship play-off places and add to relegation-threatened Birmingham's misery at St Andrews on Tuesday night.
The Latics have lost their last two matches - to Burnley and Blackpool - and are aiming to respond with a victory at Birmingham which would confirm their place in the top six with one game to go.
"We've got to try and bury Birmingham and secure our own play-off place," Perch said on wiganlatics.co.uk.
Birmingham, who have recalled defender Hayden Mullins from Notts County due to a spate of injuries, could move out of the bottom three if they end a four-match losing streak.
Perch added: "Birmingham lost at the weekend (at home to Leeds) and they'll be low on confidence but they'll have fight and spirit like Blackpool and we've got to conquer that and be ruthless."
The Blues have won just two home games all season and not since October 1 against Millwall.
Perch, who hopes lessons have been learned from the Blackpool match, added: "Their home form isn't great, it's 90 minutes and stats etc. don't really matter on the night; it's about what we can do.
"Not scoring the first goal proved to be vital, especially in a game where Blackpool were scrapping for their lives.
"I think if we (had) got the first goal they'd have been dead and buried - it just didn't happen for us on the day.
"Our focus is on Tuesday, if we get the three points there we secure the play-off place.
"We always knew we'd need the three points to secure that spot so Blackpool is one game chalked off and we have to go again against Birmingham."
If Birmingham lose and Charlton beat Watford, the Blues, Doncaster and Millwall will be scrapping on the final day to avoid joining Yeovil and Barnsley in League One.
Charlton boss Jose Riga is keen for his team to secure their safety with one game to play by beating mid-table Watford.
Riga said on cafc.co.uk: "We know what we have to do against Watford.
"We know that destiny is still in our hands and I hope we will do the job in the next game and not wait for the last one.
"We have to do what we have to do."