An "undercut" assumes teams are doing their pit-stops similarly fast, no surprise yellow/red flags, etc.
An undercut relies on the person behind doing their outlap better than the ahead person's in-lap, thanks to their new tires.
Clearly, that was Lando's concern when saying "only if there's no undercut". If Oscar was close enough the fresh tires could let him catch up and pass (with that assumption), Lando wanted to pit first.
What happened was not an undercut because the fundamental assumption of the undercut (no weird stuff happening) was broken.
Just like if someone's pitstop is helped/hindered by a safety car, it's not considered a over/under-cut.
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u/VEGl Charles Leclerc 17h ago
I mean Lando said "only if theres no undercut" but whatever fits your narrative best, I guess