Left-back Dixon suffered an ankle injury in the first half of United's 4-3 penalty shoot-out win over Ross County in the Scottish Cup on Tuesday night, a match which saw Pernis (thigh) replaced in goal by goalkeeping coach Steve Banks.
Defender Kenneth (dead leg) and forward Russell (shoulder) are also struggling to be fit, while Danny Swanson (back) and Mihael Kovacevic (knee) have returned to training but Scott Severin (foot) and Darren Dods (knee) remain out.
Source: PA
Source: PA