When Souness left for Liverpool in April 1991, Smith was appointed interim manager. This was made permanent in May 1991, after the club clinched its fourth title in five seasons. Six more league titles in succession followed under Smith's tenure, including a domestic treble in 1992–93. He also won the Scottish Cup and the League Cup three times each. Smith took Rangers to the brink of the final of the Champions League in season 1992–93, going ten games without defeat in that campaign and 44 matches unbeaten in all competitions.