Leclerc reiterated in an interview with Formu1a.uno what other sources have said about the two cars doing more tests this weekend. However, if it rains they may have to delay it until the next race.
He also said they're expecting 2-3 tenths once they find the correct setup. The comparison they did last week, where him and Sainz ran different race setups, provided a direction for them to work in.
https://formu1a.uno/it/leclerc-grosse-d ... ato-utile/
(Most recent rain forecast is 40% for Friday, 40% for qualifying, and 60% for the race according to Ian Fergusson)