It has been more than 2,000 days since bitter rivals Southampton and Portsmouth last faced each other - a 4-0 victory for Saints in the League Cup in September 2019.
Rewind to the most recent league meeting between the pair and you go all the way back to a 2-2 draw in April 2012.
Since that moment, the two clubs have been on quite different paths to get to Sunday's highly-anticipated derby in the Championship.
Southampton enjoyed success in the Premier League and a European campaign in those 13 years, while Pompey faced financial troubles and dropped all the way down to League Two before beginning their ascent back to the second tier.