The Spanish driver was renowned for his lightning-paced launches during his time with McLaren but has so far found his form difficult to replicate for the Scuderia since his winter switch.
When asked why this was the case, Sainz replied: “I went through the data analysis with my engineers trying to understand what I could have done better.
"What is clear is that I still need to get a bit better and a bit more confidence with the start system and the way we operate to get that perfect launch and that perfect first 100 metres."
Commenting on his recent poor start at his home grand prix, he added: "I don’t think that was the main limitation.
"I think the main limitation was a bit the positioning after that, getting in and out of the slipstream and then being boxed in behind [Alpine's Esteban] Ocon into turn one and losing quite a lot of positions to the cars around the outside."
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