Mark Brown will referee today’s game at The Hive - here’s all you need to know about the match official.
Who is he?
The East Yorkshire-based ref was in charge of 18 Blue Square Premier games before making the jump up to League Two in the 2010-11 season.
He has since refereed 165 Football League matches.
Most of his career has been spent in League One and Two, but has been in charge of 42 Championship games.
This season he has been the man in the middle in four League One and two League Two matches.
He is yet to take charge of a fixture in the Premier League.
What is his record?
In his career, Brown has issued 477 yellow cards.
This is just under three per game.
He has also handed out 33 red cards.
Has he refereed Pompey before?
Yes, but only twice.
He was in charge of the Blues’ last game of the regular 2015-16 League Two season against Northampton at Fratton Park.
Pompey lost the game 2-1, with Brown giving yellow cards to Ben Davies, Gareth Evans and Adam McGurk.
A red card was handed out to Kieron Freeman after 47 minutes.
The Blues’ only goal in that game came through Kal Naismith.
Jack Whatmough scored an own goal to give Northampton the lead, with James Collins scoring the winner late on.
Brown was also in charge of Pompey’s 0-0 away draw to Chesterfield on March 3, 2014.
However, no Blues players were carded that day.