We had nap trouble at 10mos also, so maybe it is a developmental thing and the start of the 1 nap transition. But i was able to slow that down by:
ensuring night sleep = 11.5
AM nap = no more then 1.5
PM nap = "
So for your LO, i would shave 15min off that am nap every couple days until you either get to 1.5hr and/or the pm nap comes back (eg: she stops fighting you. If that doesn't work after a week, i would start cutting the am nap again until you get to 1hr and/or pm comes back.
Hope that helps...below are some notes i took recently when reading on naps for this age -
Am nap s/b 1.5hr for 9mos and 1hr for 12mos
If he takes a longer nap and then has trouble sleeping in for pm nap knock off 15 – 30 mins from am nap.
Pm nap is more important and should be longer then am since this is the one they will keep.
Pm nap starts around 3hrs after am ends and should be 1.5hrs
1 nap comes around 15-18 mos – don’t attempt too early and don’t let them sleep too long in the am.