The first Dundee derby of the season takes place at Dens Park on Sunday, live on Sky Sports at 12.15pm.
Paul Hartley's side go into the game still unbeaten in the Premiership but are three points behind Jackie McNamara's men, who are joint top of the table after six matches.
Here are a few facts and figures ahead of part one of a Dundee double header - the sides meet again in the third round of the League Cup at Tannadice on Wednesday September 24.
+ The most recent meeting between the teams was an SPL fixture at Tannadice on March 17, 2013. Michael Gardyne scored a last-minute leveller for Dundee United after Dundee, who had Gary Irvine sent off, had gone ahead through Ryan Conroy.
+ Dundee United are unbeaten in the last six derby matches - four wins and two draws.
+ Dundee's last derby victory was 1-0 at Dens Park on November 6, 2004. John Sutton scored a late winner after the visitors had Chris Innes and Mark Wilson sent off.
+ The last hat-trick in a Dundee derby was scored by Juan Sara, when the Dark Blues won 3-0 in a midweek game at Dens Park in September 2000.
+ There has only been one 0-0 draw in this fixture since 1989/90 - at Tannadice in August 2002.
+ Only five of the last 20 Dundee derbies have been won by the home side.
+ In 1987/88, the sides met on eight occasions. In addition to the four Premier Division matches, Dundee won a League Cup tie and United eventually came out on top in a Scottish Cup encounter in a second replay.
+ Dundee United famously clinched the Premier Division title at Dens Park on the final day of the 1982/83 season - Eamonn Bannon and Ralph Milne got the goals for Jim McLean's men.