[1] Mikkelsen recorded a 9–8 victory over John Pulman to reach the semi-finals of the 1976 Canadian Open where he lost 1–9 to Alex Higgins.

[1] He lost in the first qualifying round each time; 7–9 to Roy Amdor in 1980, 4–9 to Jimmy White in 1981, and 6–9 to Colin Roscoe in 1982.

[1] In a qualifying match for the 1985 World Snooker Championship, Mikkelsen compiled a break of 132, but lost 9–10 to Malcolm Bradley.

[7] Reaching the last 48 of the 1984 World Championship was to be the furthest that Mikkelsen progressed in a major tournament as a professional.

[9] In 1996, Mikkelsen won the Canadian Open Nine-ball pool championship by defeating Paul Potier 15–14 in the final.