Arturs Klots is halfway towards a successful title defence at the International Bobsleigh & Skeleton Federation Para-Sport World Championships in Lillehammer.
The Latvian produced the fastest times across both runs so far at the Olympic Sliding Centre as he seeks to repeat his 2017 victory in a sport due to make its debut in the Winter Paralympic Games at Beijing 2022.
He clocked 57.46sec in the opening run before a 58.05 second.
Two more runs are scheduled for tomorrow.
Klots currently holds a lead of 0.24 seconds over Canada's Lonnie Bissonnette.
Bissonnette, the first ever Para Bobsleigh world champion in 2016, managed a combined time of 1min 55.75sec after finishing second in both runs today.
Guro Konstanse Frønsdal of Norway finished fourth in the first run but then climbed to third overall after a stronger second on home ice.
She is currently 0.92 seconds behind the leader on 1:56.43.
Latvia's Alvils Brants is 0.20 seconds further back in fourth.
So far a women has never won a World Championship medal before in the mixed entry format.
Great Britain's World Cup winner Corie Mapp lies only seventh at halfway on 1:56.98.