Arthur Fery admitted he has 'plenty to work on' after his US Open debut ended in a straight-sets defeat to Italian 13th seed Lorenzo Musetti.
The 24-year-old British number one lost 6-3 6-3 7-5 on Grandstand Stadium, a match he said was a useful gauge despite the comprehensive scoreline.
'I know what I have to work on,' Fery said. 'My serve really let me down today, which is not usually the case, but I've been struggling a little bit to find my rhythm on the serve.'
Fery, who reached the Wimbledon semi-finals as a wildcard this summer and his first ATP final in North Carolina last week, admitted his preparation was affected by that run but said he would not change it.
'Would I sign for these past two weeks? Probably, to be honest. It's a lot of ranking points, it's a first ATP final, so it's good,' he added.