Manchester City were left sweating on a possible injury to captain Vincent Kompany after he went off late in his comeback game against Swansea.
Kompany, who had not played since damaging his thigh in a Champions League semi-final against Real Madrid on May 4 and has experienced an injury-hit City career, departed during the dying seconds of the EFL Cup tie.
Goals from Gael Clichy and Aleix Garcia ultimately sealed the deal for City but substitute Gylfi Sigurdsson pulled one back for Swansea in injury time, after which Kompany departed down the players' tunnel as the home side pushed in vain for an equaliser via a last-gasp corner.