Gartner, Inc. IT) is scheduled to report first-quarter 2021 results on May 4, before market open.Let's check out how things have shaped up for the announcement.Q1 ExpectationsThe Zacks Consensus Estimate for Gartner’s first-quarter 2021 revenues is pegged at $1.05 billion, indicating growth of 2.7% from the year-ago quarter's reported figure.Going by segments, the consensus mark for Research segment revenues is pegged at $927 million, indicating 1.9% increase from the year-ago reported figure. The segment is likely to have benefited from the temporary cost-avoidance initiatives and client retention.The consensus estimate for Consulting segment revenues is pegged at $92 million, indicating decline of 4.2% from the prior-year reported figure. Decline in labor-based revenues and lower contract optimization revenuesare likely to have weighed on the segment.The consensus estimate for Conferences segment revenues is pegged at $14 million, flat with the prior-year reported figure. Gradual shifting to virtual conference mode has helped the company attain cost savings and operational efficienciesThe consensus estimate for earnings stands at $1.01, implying a year-over-year decline of 15.8%.What Our Model SaysOur proven model does not conclusively predict an earnings beat for Gartner this time around. The combination of a positive Earnings ESP and a Zacks Rank #1 (Strong Buy), 2 (Buy) or 3 (Hold) increases the odds of an earnings beat. You can uncover the best stocks to buy or sell before they're reported with our Earnings ESP Filter.Gartner has an Earnings ESP of 0.00% and a Zacks Rank #3.Gartner, Inc. Price and EPS Surprise Gartner, Inc. price-eps-surprise | Gartner, Inc. QuoteStocks to ConsiderHere are a few stocks from the broader Zacks Business Services sector that investors may consider, as our model shows that these have the right combination of elements to beat on first-quarter 2021 earnings.BGSF BGSF has an Earnings ESP of +33.33% and a Zacks Rank #2. You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.Avis BudgetCAR has an Earnings ESP of +15.22% and a Zacks Rank #3.Fidelity National Information Services FIS has an Earnings ESP of +2.01% and a Zacks Rank #3.5 Stocks Set to DoubleEach was hand-picked by a Zacks expert as the #1 favorite stock to gain +100% or more in 2020. Each comes from a different sector and has unique qualities and catalysts that could fuel exceptional growth.Most of the stocks in this report are flying under Wall Street radar, which provides a great opportunity to get in on the ground floor.Today, See These 5 Potential Home Runs >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Avis Budget Group, Inc. (CAR): Free Stock Analysis Report Fidelity National Information Services, Inc. (FIS): Free Stock Analysis Report Gartner, Inc. (IT): Free Stock Analysis Report BGSF, Inc. (BGSF): Free Stock Analysis Report To read this article on Zacks.com click here.