On 19 February 1968 a team of Canadian female swimmers arrived in South Africa to compete at the national championships at Bloemfontein. The Canadians had been on a training trip to New Zealand before arriving in Johannesburg. The team once again included Elaine Tanner and Marion Lay, with Jean Warren and Angela Coughlan.
Karen Muir had been in great form, setting multiple world records in the backstroke events in January, so a great battle was expected between her and Elaine Tanner at the 1968 South African swimming championships held in Bloemfontein..
In the end, Karen had to withdraw from the backstroke events at nationals due to a shoulder injury, leaving the field open for Tanner to win.
Karen was to return from injury and beat Elaine Tanner at the Test match held in Cape Town, on the 4th March 1968.