Aruna Dindane scored with a superb hat-trick but Paul Hart's side still remain bottom of the Barclays Premier League.

Dindane's treble was accompanied by a goal from strike partner Frederic Piquionne as Pompey scored four goals for the second time this week.

However, there was more concern for Pompey when Piquionne was stretchered off in the second half with a head injury.

Wigan Athletic were outfought and outplayed throughout and never tested England goalkeeper David James.

The home side almost made the perfect start when Kevin-Prince Boateng fired just over the crossbar inside the opening minute.

Pompey, 4-0 victors over Stoke City in the Carling Cup in midweek, enjoyed a bright opening and a corner from Jamie O'Hara was almost turned home by Hassan Yebda.

O'Hara looked particularly lively and the midfielder sent an angled drive across the face of the goal in the sixth minute.

There was much concern for Wigan when Hugo Rodallega careered over the advertising boards after trying to cross the ball into the six-yard box.

The Wigan midfielder required lengthy treatment to an arm injury before being allowed to continue.

But it was still the home side making most of the running, with O'Hara firing a 20-yard shot straight into the arms of Wigan keeper Chris Kirkland.

Portsmouth continued to dominate the opening half and when O'Hara swung over a right-wing corner in the 23rd minute, the home side could not force the ball home.

O'Hara was looking very impressive in the Pompey midfield but he was not pleased with a 24th-minute effort which found the roof of the stand from 20 yards.

Another O'Hara corner forced Kirkland into a one-handed save that almost found its way into his own net, but fortunately for the visiting keeper it ran out for another flag-kick.

Boateng was just too high again when he let fly from 25 yards in the 28th minute but Pompey's pressure was beginning to tell.

Kirkland required two attempts to hold on to a shot from Piquionne moments later as the home side pressed forward.

Rodallega wasted a good chance for Wigan on the half-hour when the visitors won a free-kick 25 yards out in a central position.

But the Wigan midfielder sent his curling shot high over the crossbar.

Pompey finally broke the deadlock in the 35th minute with a simple goal.

Michael Brown split the Wigan defence with a fine through-ball into the path of Dindane, who outpaced Mario Melchiot and flicked the ball over the advancing Kirkland for his first Premier League goal.

Pompey lost full-back Steve Finnan through injury in the 40th minute and he was replaced by Nadir Belhadj.

Moments later Wigan found a way through the Pompey defence but Jason Scotland's shot eventually finished closer to the corner flag than the home goal.

Pompey made the visitors pay the price in first-half injury time when Dindane, on loan from Lens, put Piquionne through and the striker ran clear to beat Kirkland with a low drive.

Piquionne was a constant threat but he squandered a great chance to get his second of the match moments after the re-start.

The striker, on loan from Lyon, hesitated far too long to get his shot away and Wigan's defence cleared the danger.

In the 55th minute Pompey almost added a third but Dindane's shot was deflected for a corner.

Pompey then lost Piquionne through injury moments later and he was replaced by Kanu.

Piquionne appeared to suffer a head injury in a challenge with Emmerson Boyce and Titus Bramble.

The Pompey striker appeared to get up initially but then went down again and was eventually stretchered off with his head and neck supported in a brace.

Dindane then missed a good chance in the 61st minute when he failed to connect with O'Hara's free-kick on the edge of the six-yard box.

Luckily for Wigan, Kirkland had his wits about him and managed to save well before Dindane could react again.

But Dindane atoned for his error in the 64th minute when he tapped home a cross from Kanu at the far post to put Pompey 3-0 in front.

Yebda then went close from another pinpoint O'Hara free-kick as the home side went looking for more goals.

Wigan tried to get back into the match but Charles N'Zogbia fired high and wide after bursting through the home defence.

But Pompey stretched their unbeaten run to three matches when Kanu was brought down by Boyce and Dindane completed his hat-trick from the spot in the 90th minute.