At most jet lag lasts one week. Kickoff ended, at latest, March 3rd. Assuming they got on a flight 4 days after, they still had enough time to beat out the jet lag.
If they fly four days after the first event finishes, it would give them one week to adapt, which is an unproductive dead time where they can't fully utilize. This only leaves 2 to 4 days for preparation for the next event
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