(Reuters) - McDonald's Corp (MCD.N), the world's biggest restaurant chain, reported a 7.3 percent fall in quarterly sales as it struggled to recover from a food scandal in China and battled tough competition in the United States.

The company's net income fell to $1.1 billion, or $1.13 per share, in the fourth quarter ended Dec. 31 from $1.40 billion, or $1.40 per share, a year earlier.

Revenue fell to $6.57 billion from $7.1 billion.

(Reporting by Yashaswini Swamynathan in Bengaluru; Editing by Kirti Pandey)