Vowels in "physical" and "fizzy"

Recently in GermanLanguage.SE, somebody who tried to explain how to pronounce the German vowel "ü" claimed that some speakers of English may use a slightly rounded vowel in Greek loan words like "physical". The dictionaries that I have consulted don't give any alternative pronunciation besides /ɪ/. Are there really native speakers for whom the first vowels in "physical" and "fizzy" are different?

Solution 1:

No, the 'y' in Greek loan words like this is invariably just a short 'i' (/ɪ/) sound. In German itself they tend to pronounce these 'y's as ü. This is also the case in Danish, I believe.