The pan-European STOXX 600 index fell 0.1%, snapping a four-session rally.
Prosus NV, which has a 28.9% stake in Tencent, tumbled 8.8% to a more than one-year low after Beijing intensified its regulatory crackdown on the Chinese internet giant.
"The current profit taking induced in part by pressure on China's tech is unlikely to last long as U.S. stocks should again be bought on the dip," said Sebastien Galy, senior macro strategist at Nordea Asset Management.
Despite concerns about surging COVID-19 cases globally and rising inflation, the STOXX 600 hit a record high on Friday as strong earnings reports and dovish signs from the European Central Bank boosted appetite for risky equities.
Automakers fell on Monday. Porsche was down 1.9% as it traded without entitlement for dividend, and French car parts maker Faurecia slipped 5.7% despite raising its 2021 net cash flow target.
Europe's largest low-cost carrier, Ryanair, rose 3.8% as it nudged up its forecast for full-year traffic on strong summer bookings.
That helped the wider travel and leisure sector to be among the few sectoral gainers on Monday.
Analysts expect second-quarter profit at STOXX 600 companies to jump 115% versus a year ago, as per Refinitiv IBES data. Out of nearly a third of STOXX 600 companies that have reported so far, 63% have topped profit estimates.
"We continue to advocate a strong weighting towards Europe," equity strategists at Jefferies wrote in a note.
"We expect European economic momentum to pick up running into 2022 accompanied by earnings growth ~67% y-y for 2021 and ~22% y-y for 2022 which should lift the STOXX 600 index to 500."
Germany's DAX index fell 0.3% after an Ifo institute survey showed business morale fell unexpectedly in July on continuing supply chain worries.
"The DAX is underperforming after the latest IFO survey appeared to suggest that the German economy is starting to slow in the wake of rising costs and Delta variant infections," said Michael Hewson, chief market analyst at CMC Markets.
Spanish pharmaceuticals company Almirall fell 11.6% after posting a first-half net loss of 42.8 million euros ($50.41 million).
German biotech firm Morphosys slid 8.7% after cutting its revenue guidance for 2021.
(Reporting by Sruthi Shankar and Shreyashi Sanyal in Bengaluru; Editing by Sriraj Kalluvila and Timothy Heritage)
By Sruthi Shankar and Shreyashi Sanyal