Inter Milan cruised to their first Champions League win of the season with a fine victory over Red Star Belgrade.
Hakan Calhanoglu gave his side an 11th-minute lead with a fine curling free-kick that went in off the post.
Former Stoke and West Ham striker Marko Arnautovic doubled Inter's lead in the 59th minute with a simple finish after Mehdi Taremi won the ball high up the pitch and played in the 35-year-old.
Taremi also pinched the ball in a dangerous area in the 71st minute and set up substitute Lautaro Martinez for the home side's third.
Forward Taremi then got the goal he deserved late on by chipping in a penalty after Martinez was brought down in the penalty area.
Inter, who made seven changes from their Serie A win over Undinese, drew 0-0 with Manchester City in their Champions League opener last month.
Red Star Belgrade are still waiting for a league-phase win after losing 2-1 to Benfica in September.