Paul Scharner admits Wigan must learn how to close games out if they are to avoid a basement battle.
The Latics allowed two points to slip through their grasp against Stoke on Tuesday as they were held to a 1-1 draw at the DW Stadium.
Roberto Martinez's men also let the Potters off the hook during the reverse fixture at the Britannia Stadium, missing a late penalty and with the hosts hitting back on two occasions to snatch a share of the spoils in a 2-2 draw.
In all Wigan have thrown away 16 points this term and such results could prove costly come the end of the season, with just a point separating them from the Premier League drop zone at present.
Versatile Austria international Scharner insists the Latics cannot afford to be so hospitable to unforgiving opponents and has warned that they must start grinding out results if they are to preserve their top-flight status.
"Stoke was the second game in a row we've lost a one-goal lead, and it is starting to get disappointing," Scharner told the Wigan Evening Post.
"We're in the middle of a relegation battle, and in these types of games we should be looking to come away with all three points. We tried really hard to add a second goal, particularly in the first half.
"But it's in the second half where our problems lie - we can't seem to sustain the performance over 90 minutes.
"We have to keep our opponents under pressure for the whole game, and I think that should be our focus now for the rest of the season."