CHICAGO — Pat Riley insists he’s a changed man, even if his return to coaching had a decidedly familiar feel.

He whistled to get his player’s attention. He stalked the sideline in a designer jacket and slacks. His hair was slicked back. And, yes, his team won with an All-Star center leading the way.

Riley’s second tenure as Miami Heat coach got off to a successful start Tuesday night, with a 100-97 victory over the Chicago Bulls.

‘‘Yes, I liked this win,’’ Riley said. ‘‘If we had lost, I’d have gone and retired.’’

The team president stepped back into his old job Monday, when Stan Van Gundy resigned. He saw a doubledigit lead in the fourth quarter dwindle to two, then watched a 3-pointer by Chicago’s Luol Deng clang off the rim as time expired.

‘‘You coach on instinct,’’ Riley said. ‘‘It’s going to take some time for me to get real comfortable with all the things you have to do at the end of the game. It’s going to take me time to get up to speed on everything.’’

Shaquille O’Neal scored a game-high 30 points in his first start and second game back for Miami since spraining his right ankle — an injury that knocked him out of 18 games. Dwyane Wade and Antoine Walker scored 14 apiece.