Perth Glory coach Dave Mitchell has urged his players to find more of an edge whenever they happen to take the lead.

The A-League's co-league leaders [with Adelaide United] were cruising against Wellington Phoenix with 20 minutes to go yesterday but conceded a 'soft' goal when Ben Sigmund headed home from a corner.

The goal gave the Phoenix a chance of taking a point from the game which would have been a miracle after they were completely outplayed by the Glory and it prompted Mitchell to urge his side to be more ruthless in front of goal.

"We made it hard for ourselves I think," admitted Mitchell. "We created quite a few chances.

"We didn't capitalise on them and Wellington always had a lot of threat in their side and as soon as they got the goal back it was like, sit on your seat and hold on 'cause they threw a lot of balls into the box and they could have bounced anywhere.

"We scored the second goal (and) we thought we've got the game won now, because we've been good at keeping clean sheets at certain times.

"Obviously we didn't and that's something to address.

"When you've been so dominant and create so many chances - and we didn't put them to the sword - that's when it comes back to bite you on the backside. That could have happened today and fortunately it didn't."