Portsmouth are without defender Greg Halford, who is suspended after picking up his fifth booking of the season.But Carl Dickinson is available after serving a three-match ban and will return at left-back, with Joel Ward replacing Halford at right-back. [LNB]Millwall captain Paul Robinson looks set to miss the trip to Fratton Park because of a hamstring injury. [LNB]Kevin Lisbie (knee) is set to return to the squad and midfielder Liam Trotter (hamstring) could also be available. [LNB][LNB] MATCH PREVIEW The frozen weather conditions mean Portsmouth have not played at home since 13 November, when they suffered a 3-2 defeat against Doncaster. [LNB]Since then, Pompey have enjoyed two excellent away victories. Their wins at promotion chasing Swansea and Cardiff have left the south-coast side 15th in the table and six points off a play-off spot. [LNB]They are a place below Millwall, who are ahead of them on goal difference. The Lions are also in good form, having gone four matches unbeaten and conceded only one goal in the process. [LNB]Neither of these clubs have given their fans much Christmas cheer in recent years. A win for Pompey would be their first on Boxing Day for four years, while Millwall have lost their last two matches on 26 December. [LNB][LNB] MATCH FACTS Head-to-head[LNB]• Portsmouth have won their last four matches against Millwall, scoring a total of 10 goals and conceding none. [LNB] Have your say on this match • Millwall's only league victory at Fratton Park in 17 visits was a 1-0 win in September 1995. [LNB]Portsmouth[LNB]• No team have kept fewer clean sheets in the Championship this season than Pompey, who have managed only three. [LNB]• They are averaging a Championship goal every 3.43 shots on target. It is the best ratio in the division. [LNB]Millwall[LNB]• Millwall have won seven, drawn seven and lost seven of their Championship matches this season. [LNB]• The Lions are four goals away from the club's 2,000th in the second tier. [LNB]• They are also one point away from their 100th under manager Kenny Jackett.