All you need to know ahead of Saturday's trip
Millwall travel to Bradford City on Saturday aiming to keep riding the coattails of the top six in Sky Bet League One.
After a run that has seen The Lions unbeaten in five in the league - with a stunning Emirates FA Cup victory over AFC Bournemouth thrown into the mix - Neil Harris' side sit in eighth place in the table, four points behind sixth-placed Fleetwood Town.
However, the hardest of tasks is presented at their feet this weekend, as they face a Bantams side undefeated at home this season. With six wins and eight draws accompanying just nine goals conceded at The Northern Commercials Stadium in 2016/17, Stuart McCall's side are firmly entrenched in the play-off places and will no doubt have aspirations to break into the top three and launch a bid for automatic promotion.
The last time they were beaten on their own patch, though, was by a Millwall side intent on gaining an advantage in last May's Sky Bet League One play-off semi-final first leg.
Around 2,000 Lions fans made their way to BD8 for a Sunday lunchtime kick-off and they were not disappointed, as a first-half blitz all but put the tie to bed.
Tony McMahon handed the home side the lead from the penalty spot after Joe Martin handled, but just 90 seconds later, The Lions were back on level terms, thanks to a sharp finish from Lee Gregory.
On 34 minutes, Millwall nudged themselves into the lead, as Steve Morison powered home a header from a Shane Ferguson corner. Ten minutes later, the lead was extended, as Joe Martin beautifully curled in a free-kick from around 25 yards out.
The visitors stood firm in the second half and came away with a resounding lead, which was defended well in the second leg - a 1-1 draw meant that Neil Harris would lead his team to a Wembley Stadium play-off final in his first full season of management.
The League meetings between the two earlier that year were tight, with just one goal - a Steven Davies header - separating the two at The Northern Commercials Stadium after a goalless draw at The Den.
In September 2016, Joe Martin was once more on the score-sheet, as he thumped home the equaliser in a 1-1 draw at The Den, after a Bryon Webster own-goal had handed Bradford the lead.
Darren Byfield and Tony Craig ensured a share of the spoils on the final day of the 2006/7 campaign in a 2-2 draw, while earlier that season, three meetings in 11 days saw The Lions claim two wins - one in the League and one in an FA Cup replay, after the initial game was drawn.
Notable other meetings with The Bantams include a 2-1 victory in December 2001, complete with Sean Dyche 90th minute winner, while supporters of a certain vintage may remember a 4-0 win in February 1985, in which a John Fashanu double helped The Lions on their way to victory in a campaign that ended with promotion to the old Division Two.
Millwall hold the upper hand with regards to the historical record with Bradford City - 17 wins dwarfs The Bantams' 10, while a further 17 have been drawn.