** HK shares of Trip.com Group 9961.HK slip 5.6% to HK$495.2, lowest since January 14

** Stock set for biggest one-day pct decline since February 5

** U.S.-listed stock TCOM.O fell 3.5% on Monday

** Chinese one-stop travel platform operator's Q4 revenue rises 23% y/y to 12.7 bln yuan ($1.75 bln)

** Q4 non-GAAP net income at 3 bln yuan vs year-ago 2.7 bln yuan and 6 bln yuan in Q3

** "We view TCOM's 4Q24 revs solid while non-GAAP OPM might be below some investors' expectation," Citi ("buy") says

** YTD, HK stock down 7.2%, while U.S.-listed shares down 5.8%

($1 = 7.2600 Chinese yuan renminbi)

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))