Bayer Leverkusen welcome Union Berlin to the Bundesliga season opener carrying a form advantage that measures 5.33 points out of 10, the hosts rated at 7.33 for recent momentum while the visitors scrape along at just 2 out of 10. The 12-2 demolition of Optik Rathenow on 4 July inflates Union's goals column but the subsequent stretch tells a truer story: beaten 2-0 by FC Carl Zeiss Jena, held 1-1 by both FC Winterthur and Chemnitzer FC, then beaten 1-2 by FC Aarau. No clean sheet across those 5 matches and no result carrying the conviction needed for a Bundesliga opener against opponents who scored 16 goals in their last 5 outings, conceding only 6.

Leverkusen's attacking output looks reliable across the full sample, 16 goals at better than 3 per match and a run of 5 consecutive games with the scoresheet breached. The 7-0 friendly win at SF Baumberg and the 3-1 victory over Kickers Offenbach in late July kept sharpness ticking over, and the home form from the end of last term adds weight: 4-1 against RB Leipzig and 1-1 with Hamburger SV both came on this ground. Union's defensive record offers little reassurance, 8 conceded across 5 friendlies without a single clean sheet to show. The 15 goals scored looks a healthier number until the Optik Rathenow outlier is removed, leaving 3 goals from the other 4 matches, all of which ended in draws or defeats. The contrast in finishing quality and defensive coherence points toward an afternoon where the hosts control territory and chances.

The head to head ledger runs 5 wins for Leverkusen, 1 for Union and 4 draws across the last 10 meetings, a record that translates to 2.2 goals per fixture and over 2.5 goals in 4 of those 10. The most recent stretch underlines Leverkusen's edge: they won 2-0 at home on 4 October 2025, drew 0-0 at home on 12 April 2025, won 2-1 away on 30 November 2024, and won 1-0 away on 6 April 2024 before Union finally broke through with a 1-0 home win on 21 February 2026. That single reverse interrupts an otherwise one-sided pattern, and the 0-0 in April 2025 remains the only goalless fixture in the itemised five. Both teams scored in just 3 of the 10 overall, suggesting Leverkusen tend to dictate proceedings rather than trade blows, and the over 2.5 goals rate of 4 from 10 sits slightly below the current form profiles of both sides.

Leverkusen's sample carries genuine competitive heft, three of the five most recent matches drawn from Bundesliga action where they collected 8 points from a possible 9 across those fixtures. Union's calendar has been lighter, five summer friendlies against varied opposition producing patchy returns and no rhythm to speak of. The defensive fragility evident in conceding across every outing clashes directly with Leverkusen's scoring streak of 5 from 5, and the 1 clean sheet Leverkusen managed in that sample came in the 2-0 home win over Union last October, a result that fits comfortably into the broader pattern of home control. The form gulf, head to head dominance and goals profile all converge on a fixture weighted heavily toward the hosts, with the question hanging over margin rather than outcome and whether Union's pre-season shortcomings translate into Bundesliga vulnerability or whether competitive edge closes the observed gap.