"Pillowtalk" & "Summer Sixteen" should each start with hefty sales, with Zayn's song a challenger for No. 1.

Justin Bieber just made headlines by replacing himself atop the Billboard Hot 100 (dated Feb. 13), with "Love Yourself" dethroning "Sorry," but a pair of fellow male stars are gunning for the chart's upper reaches next week.

Former One Direction member Zayn Malik's first solo single, "Pillowtalk" (credited simply to Zayn), appears headed for perhaps 250,000 downloads sold in its first week, according to industry forecasters, while Drake's "Summer Sixteen" could arrive with 210,000-220,000. The former was released Jan. 29 and has already opened atop this week's Billboard + Twitter Top Tracks chart. The latter was released Jan. 30.

Based on such strong sales projections, along with expected streaming and airplay sums, "Pillowtalk" and "Summer Sixteen" each appear headed for top 10 debuts on next week's Hot 100 (dated Feb. 20), with the former almost certain to start in the top five and challenge for No. 1 upon its entrance.

Beyond sales projections (and with the Hot 100 encompassing sales, airplay and streaming), "Pillowtalk" has drawn 5.9 million in all-format radio audience in the first three days of the Hot 100's airplay tracking week, according to Nielsen Music; "Sixteen" has garnered 3.4 million. Based on streaming data collected through Feb. 3, "Pillowtalk" has tallied 17 million U.S. streams for the week; an estimated streaming total for "Sixteen," an Apple Music exclusive, is still being tabulated.

The steamy, atmospheric "Pillowtalk" is from Zayn's debut album Mind of Mine, due March 25. Drake's diss track is not confirmed to appear on his next album, Views From the 6, due in April.

To find out where both songs officially debut on the Hot 100, check Billboard.com Monday (Feb. 8), when highlights of the chart will post. All charts (dated Feb. 20) will update on Billboard.com the following day (Feb. 9).

Additional reporting by Keith Caulfield