There's still time to change your fantasy football lineup for Week 1, so here's a quick guide to which players you should start based on favorable matchups.

Also, check our Week 1 fantasy football rankings

Quarterbacks

Matt Ryan (ATL) vs. Philadelphia — Ryan opens the season at home in what should be a shootout against the Eagles. In fact, this game is projected to be the highest scoring game of the week, according to oddsmakers, with two strong offensives mixing with two poor defensive units. The Eagles allowed the second most passing yards per game in 2014 (265), second only to Atlanta (280), and were the third best matchup for opposing fantasy quarterbacks (18.9 Fantasy Points Per Game, ESPN.com standard scoring).

Tony Romo (DAL) vs. Giants — When these two teams get together, the defenses never seem to show up. The Cowboys scored 31 points in each of last year’s meetings, with Romo totaling 554 yards and seven touchdowns. He will look to exploit a Giants secondary that figures to be even worse than it was last season, after season-ending injuries to Bennett Jackson, Mykkele Thompson and Justin Currie this preseason.

Eli Manning (NYG) vs. Dallas — It has been a typically poor preseason for Manning and the Giants offense, but a date with Dallas could get things turned around. Manning countered Romo last season with 248 yards and three touchdowns in Week 7, and 338 yards and three touchdowns in Week 12. Dallas’s secondary is arguably in worse shape than the Giants’. With their best cornerback, Orlando Scandrick, lost for the season, the Cowboys are forced to roll with Brandon Carr (ProFootballFocus.com’s 13th worst cornerback in 2014), the rookie Byron Jones and the often-injured cornerback Morris Claiborne.

Ryan Tannehill (MIA) vs. Washington — Coming off a near-perfect preseason, completing 33 of 41 pass attempts (80.4 percent) for 303 yards and three touchdowns without an interception, he should continue to shine against last season’s most favorable fantasy quarterback matchup. In 2014, the Redskins allowed the fourth highest completion rate (66.5) and the most passing touchdowns (35) and had the fourth fewest interceptions (7).

Running Backs

Jeremy Hill (CIN) vs. Oakland — The Raiders allowed the third most rushing touchdowns (17) and the 11th most rushing yards per game (119) in 2014, leading to the most fantasy points allowed to running backs. Our seventh ranked running back heading into 2015, Hill should get off to a fast start against this defense.

Doug Martin (TB) vs. Tennessee — Martin is coming off a strong preseason, with 118 yards and one touchdown on 20 carries, and has cemented himself as the starting back in Tampa Bay. The Titans, who rated as PFF.com’s fourth worst run stopping unit last season, allowed the second most rushing yards per game (137) and the second most fantasy points to running backs.

DeMarco Murray (PHI) vs. Atlanta — In an attempt to remedy their N.F.L.-worst defense, the Falcons brought in the former Seattle defensive coordinator Dan Quinn. But stopping the run could still be an issue, as this off-season’s best acquisition, the Clemson edge rusher Vic Beasley, is projected to be more of a situational pass rushing specialist in his first year. Murray may not see as many carries as last season, but he will see enough to produce strong fantasy numbers against the third best fantasy matchup from 2014.

Jonathan Stewart (CAR) vs. Jacksonville — The Jaguars yielded 127 rushing yards per game in 2014, the sixth most in the league. Injuries were part of the problem for the defensive line last season, and could be again this season. Their top draft pick, defensive end Dante Fowler Jr., is out for the year with a torn A.C.L. and both starting defensive tackles, Roy Miller and Sen’Derrick Marks, are attempting to return from serious injuries.

Wide Receivers

Jordan Matthews (PHI) vs. Atlanta — Atlanta struggled against receivers in 2014, allowing the seventh most fantasy points (24 F.P.P.G.) and the sixth most yards after the catch, and finished as the fourth worst pass coverage unit (PFF.com). While Desmond Trufant is emerging as one of the best cornerbacks in the game, Matthews should mostly avoid him operating out of the slot position.

Kendall Wright (TEN) vs. Tampa Bay — After a strong preseason, Wright appears to be the rookie quarterback Marcus Mariota’s favorite target. Tampa Bay does feature the standout cornerback Alterraun Verner, but over all, its secondary ranked 28th against the pass in 2014 and allowed the third most fantasy points to opposing receivers (25.7 F.P.P.G.). The Buccaneers also allowed receivers to catch an eye-opening 70 percent of their passes, the highest rate in the league.

Davante Adams (GB) vs. Chicago — Packers quarterback Aaron Rodgers threw 10 touchdown passes against the Bears’ 30th ranked pass defense in two games last season. In each of those games, Jordy Nelson, the man Adams is set to replace, surpassed 100 yards and had two touchdowns. The Bears’ returning cornerbacks, Kyle Fuller and Tim Jenkins, were part of a secondary that allowed 23.7 F.P.P.G. to the position (11th most) and the second most touchdowns to the position (34).

Brandin Cooks (NO) vs. Arizona — The Cardinals had the fourth worst pass defense in 2014, including the most yards allowed after the catch (147 per game), and that was with the talented cornerback Antonio Cromartie, who skipped town to rejoin Darrelle Revis in New York. Arizona also lost one of the game’s top defensive minds, Todd Bowles, to New York; cut the veteran defensive end Darnell Dockett; and let lineman Dan Williams sign with Oakland.

— Justin Sablich