The World Mixed Curling Championship semi-finalists were decided today at Curl Aberdeen, with Norway among those reaching the last four ©Getty Images

Sweden, Spain, Norway and Canada have all progressed to the World Mixed Curling Championship semi-finals following the first day of knockout rounds in Aberdeen.

There were no upsets as the top four seeded sides all fended off challenges from lower ranked teams at Curl Aberdeen in the Scottish city.

The four had secured their places directly into the quarter-finals after topping their groups in the round-robin stage.

Top seed Sweden won comfortably against Belgium as skip Johan Nygren helped his side to a 7-2 victory.

They began well with a first-end double before closing out the performance with a triple, which prompted Belgium to throw in the towel and end the game with two ends to spare.

Sweden's neighbours Norway suffered the biggest scare of the quarter-finals before eventually prevailing 8-5 against Latvia.

The two traded scores until the final end where Norway put three decisive points on the board, as they kept their hopes of winning a first title since 2015 alive.

Maia Ramsfjell's team are set to face Sergio Vez and Spain after the latter downed Japan 6-4.

It was a shaky start for the Spaniards as they went without points for the first two ends but a three-point haul in the third end set them up for victory.

Defending champions Canada, searching for a fourth straight title, picked up a comfortable 7-3 win against Australia.

They all but secured the semi-final meeting with Sweden after just three ends when they powered to a 5-0 lead.

The semi-finals, third place playoff, and gold medal-match are all set to take place tomorrow.