The 2012 Olympic course produced a tough challenge for the bulk of the field with Slovenian double world champion Peter Kauzer dislocating his shoulder.
The C1W particularly struggled producing multiple gate touches.
2013 C1 World Cup series winner, Fox improved on her semifinal performance by nearly 10 seconds but it was not enough to clinch a medal with the 19 year old missing out by 0.07 seconds to Qianqian Teng of China.
British paddler Mallory Franklin dominated her home course winning the gold in 122.44, 9.80 seconds ahead of fellow countrywomen Eilidh Gibson.
Borrows got her World Cup season off to a solid start finishing a respectable eighth, 22.23 seconds behind Franklin.
Earlier in the day NSWIS canoeist Rosalyn Lawrence finished 13th in the semifinal.
Ian Borrows was the best of the Australian men at Lee Valley finishing 18th in the C1M semifinal.
The 24 year olds raw time of 103.06 would have been fast enough for a place in the final, but four seconds in penalties for gate touches on seven and 18 proved costly for the Australian Open champion.
Western Australian Robin Jeffery finished closely behind Borrows in 20th place.
On Friday Victorian Christian Fabris finished 38th in the heat.
Great Britain continued to dominate their home course with David Florence winning the C1M final in 99.87, 3.33 seconds ahead of Slovakian Matej Benus. Fellow Slovak Michal Martikan finished third.
World number nine Lucien Delfour was the best of the Australians in the K1M event finishing 24th in the semifinal.
Fellow NSWIS kayaker Will Forsythe also featured in the semi finishing 29th.
The final was won by Frenchman Boris Neveu in 95.19, 2.34 seconds of Czech paddler Vit Prindis. Mateusz Polaczyk of Poland collected the bronze.
U23 World Championship finalist Jaxon Merritt of Victoria finished 50th in yesterday’s heat.
The team finals proceeded the individual events with Delfour, Forsythe and Merritt producing a clean run of 113.18 to finish fourth in the K1M team event.
The action continues tomorrow in London with the K1W and C2M semifinals and finals.
Fox, Victorian Sarah Grant and Lawrence all impressed in the K1W heats on Friday finishing third, ninth and eleventh and will be looking to carry that form into tomorrow.
Australian C2 pairing Robin Jeffery and Ethan Hodson will not feature tomorrow after being eliminated in the heat on Friday in 21st place.
Racing will get underway from 7pm AEST.
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