Millwall arrive at this midday kick-off sitting top of the Championship on 6 points, 9 places and 3 points clear of their hosts, having yet to concede a goal in two league outings. Their opening fortnight brought a 2-0 victory at Bristol City followed by a 3-0 home dismantling of Norwich, extending a run to 8 scored and just 2 conceded across their last five matches in all competitions. Portsmouth began with a 1-3 home reverse to QPR before bouncing back with a 3-1 win at Lincoln, leaving them 10th on 3 points with 4 scored and 4 conceded from two, their season profile showing 1.26 expected goals per game against Millwall's 2.16.

The early campaign form bands capture the gap neatly: Portsmouth rate 3.3 out of 10, a poor mark weighted heavily by that opening-day loss and a League Cup defeat at West Ham by the same 1-3 scoreline, while Millwall sit at 5.4 out of 10, a steady rating built on three wins from their last five including a 1-0 friendly success against Antwerp. Millwall have kept clean sheets in 3 of those 5 and scored in every outing, posting shut-outs in 30 percent of their four competitive fixtures so far. Portsmouth managed just one clean sheet across their last five, a goalless friendly draw at SV Darmstadt, and have blanked in 20 percent of their four-match sample despite finding the net in 4 of their last 5 overall.

The recent head to head record leans sharply toward the visitors, who have won 6 of the last 8 meetings with Portsmouth claiming 2 and no draws between them. However, both of Portsmouth's wins came in the last two clashes: a 3-1 home victory in November 2025 and a 3-1 away triumph in February 2026, suggesting they have cracked a formula that eluded them in the earlier sequence when Millwall took three straight by 1-0, 2-1 and 1-0 margins. Across those eight fixtures the average sits at 2.25 goals, with both teams scoring in exactly half and over 2.5 goals landing in 4 of 8, a profile that tilts marginally under but has delivered attacking spectacle often enough.

Millwall's 2.50 goals per game in the league so far and Portsmouth's 2.00 both sit above that historical meeting average, and the visitors' 0.00 conceded per game in the Championship stands out as the headline defensive number. Portsmouth generated 4.8 shots on target per outing across their four-match sample and averaged 55.5 percent possession, figures that suggest they can create chances but may struggle to break down a side yet to yield in the league. The 2.1-point form gap favours Millwall, yet the head to head split shows Portsmouth took 6 points from 6 available in the most recent season, a pattern that clouds any straightforward read of the table positions and points to a contest tighter than 1st versus 10th might imply.