To cover that hypothetical, here is a scouting report on the 20-year-old Bosnia and Herzegovina international.
Kolasinac is a 6'0", 181-pound left-back, who beat out Christian Fuchs for an extended run in the first team.
Further leeway was given to Kolasinac when Dennis Aogo, who interchanged from midfield to left-back, tore his medial collateral and cruciate ligaments in his right knee, per Schalke's official website.
In Kolasinac's second season at Schalke, he showed immense promise.
He is an aggressive, buff, heftily built defender who makes bone-jarring tackles.
|League Only||Alberto Moreno||Sead Kolasinac|
|Tackles Per Game||1.8||2.9|
|Fouls Per Game||1.0||1.5|
|Tackles Per Foul||1.7||2.0|
|Interceptions Per Game||2.5||1.7|
Kolasinac works hard, such as sliding in to clear the ball against Hamburg and cutting off eight passes against Augsburg, per Squawka.com.
Going forward, Kolasinac is uptempo, indefatigable and acts as Schalke's Duracell bunny, thus emulating Fuchs.
Kolasinac carved up Augsburg's defence with a surging run and played in Schalke centre-forward Klaas-Jan Huntelaar for a goal.
Kolasinac shrugged off a challenge from Hannover 96 centre-back Marcelo Guedes, created separation, took Hannover centre-back Andre Hoffmann out of the play and set up Schalke right attacking midfielder Jefferson Farfan for a tap-in.
While Kolasinac did not score a goal in the Bundesliga, his powerful instep shot swerved past Eintracht Frankfurt goalkeeper Kevin Trapp and crashed into the post.
Kolasinac's frenetic approach to defending exposes him to being caught out when he fails to win the ball.
The entire left flank was opened up when he missed a tackle on Borussia Dortmund utility player Kevin Grosskreutz, who got off a pass to Dortmund left attacking midfielder Marco Reus, one of the best players in the Bundesliga.
Against Augsburg, Kolasinac missed six tackles, per Squawka.com.
|Publication||Bundesliga Player Ranking|
Kolasinac is a belligerent, high-motored, proactive left-back who has elite upside.
If Liverpool manager Brendan Rodgers and the front office fail to secure the signing of Moreno, then targeting Kolasinac is a viable alternative.
Statistics via WhoScored.com