Fox, an Olympic bronze medallist in the women's K1 at Rio 2016, finished third in C1 qualifying with a time of 112.34sec before securing her place in tomorrow's K1 semi-finals with a second place finish in a time of 98.45, 0.26 seconds behind leader Marie-Zelia Lafont of France.

"It was a really long day because I raced in both categories," said Fox after the K1 heats.

"I tried to qualify for C1 on the first run so I could have a rest and focus on this afternoon's race. 

"I am happy with how the race went. 

"There was one touch on gate 16 but everything else was ok, so I'm glad to be second."

Austrian Nadine Weratschnig finished first in C1 qualifying with 111.03, however she was penalised on four occasions.

Behind her, in second place, was Great Britain's Mallory Franklin, who also picked up four penalties. 

Her compatriot Kimberley Woods finished fourth in 112.75.

There was then a huge gap in the field as the next best competitor was a staggering 8.23 seconds behind the leader with six penalties.

The first qualifying heat of the day was in the men's C1 event where 20 spots for the next round were available.

Thomas Koechlin of Switzerland set the quickest time and qualified in first place in a time of 92.48 with zero penalties.

In second place was Slovakia's Rio 2016 silver medallist Matej Beňuš who, despite conceding two penalties, was only 1.28 seconds behind Koechlin.

Behind Benus in third was home favourite Tomáš Rak.

"My aim was to somehow to get through the qualification round, if possible, clean and to qualify for the semi-finals," said Rak.

"The atmosphere is absolutely amazing here and the fans pushed me forward."

In the men's K1 qualifiers, only four men out of the 20 strong field picked up any penalties.

Finishing in first place was German Sebastian Schubert in 83.96.

Behind him in second was Italy's Giovanni De Gennaro, 1.07 seconds behind Schubert in 85.03.

Olympic bronze medallist Jiří Prskavec of the Czech Republic also made it safely into the final. 

His time of 86.63 was enough to take him into sixth place, 2.67 seconds behind the leader.

The men's canoe double (C2) qualification once again proved that Slovakia's Škantár cousins are the duo to beat.

The Rio 2016 gold medallists -Peter and Ladislav - stormed to the top of the qualification standings in 100.39.

In second place were Czech duo Ondřej Karlovský and Jakub Vane who finished in 100.72, 0.33 seconds behind the leaders.

Olympic bronze medallists Gauthier Klauss and Matthieu Péché of France qualified in eight position in 105.24. 

Tomorrow's programme is due to start at 9am local time with the semi-final heats of the single competitions.