O'Hara was on loan from Tottenham to Portsmouth last season when they lost their top-flight status. The 24-year-old midfielder has now made the switch to Molineux - initially on loan but with a view to a permanent transfer - and scored his first goal for the club during yesterday's 1-1 draw at West Brom.
But a stoppage-time equaliser from Carlos Vela - on loan to the Baggies from Arsenal - left Wolves at the bottom of the table. Wolves have let in goals in time added on against Fulham (lost 2-1), Bolton (lost 1-0), Manchester United (lost 2-1) and now their local rivals.
O'Hara said: "We've got a better squad here than at Portsmouth. The team is better. We play better football. We create a lot more chances.
"But we've got to cut out the goals right at the death. I've played four games now and, in two, we've lost in the last minute. We can't give away goals like that. That is what happened at Portsmouth as well.
"We played well all season and we gave away goals at the death and in the end it is going to cost you so we've got to cut those out. We've got a lot of winnable games coming up and we've got to make it count."
Source: PA
Source: PA