I don't think he is ready for 1 nap (not yet
) but he could do with some more A time in the morning & afternoon. Most can handle 3hrs in the morning & 3.5 in the afternoon & before bedtime. Try something like this:
7am, - wakes
10-11am - morning nap
1:30-3ish - afternoon nap
7 - bed
Also if he is starting to refuse the afternoon nap, you could try & cut the morning nap down to 45mins.....
HTH
Layla