Starbucks (SBUX) reported second quarter earnings Tuesday that came in below Wall Street estimates as new CEO Brian Niccol's attempts to turn around the coffee giant. US comparable store sales — a closely watched metric that includes results only from stores open for more than a year — fell for the fifth-consecutive quarter,

By Juveria Tabassum (Reuters) -Starbucks faces challenges in reviving its business, CEO Brian Niccol said on Tuesday, after the coffee giant posted disappointing global comparable sales and profit with inflation and economic uncertainty driving up costs and dampening U.

Key Takeaways Starbucks plans to report fiscal second-quarter results after the market closes Tuesday.The report marks the third since new CEO Brian Niccol took the role in September.Analysts expect quarterly revenue to improve year-over-year for the first time in more than a year.