Ibrahimovic, PSG crush newcomer Bastia
''I'm getting better and better,'' said Ibrahimovic, Serie A's top scorer last season with 28 goals. ''I played well, but when the team is playing well, then I play well.''
Ibrahimovic also set up the first goal for winger Jeremy Menez and was involved in the buildup to PSG's other goal, scored by midfielder Blaise Matuidi.
''Just because we won 4-0 doesn't mean it's easy,'' Ibrahimovic said. ''You have to go on the field and do your job, you are playing away and you can hear their supporters.''
Big-spending PSG moved provisionally up to third.
''It's a good win for our confidence and in terms of the league table,'' PSG coach Carlo Ancelotti said.
PSG took the lead after just six minutes, when Nene's free kick from the left found Ibrahimovic on the right and he flicked the ball straight back across goal to give Menez an easy finish from close range.
Ibrahimovic punished Bastia's sloppy defending in the 40th when he ran onto Italian midfielder Marco Verratti's superbly weighted pass through the middle and clipped the ball over Brazilian goalkeeper Novaes.
Ibrahimovic was shown the yellow card just before the break when he was involved in a running argument with Bastia's Gael Angoula, although it seemed to amuse Ibrahimovic when he was booked.
Brazilian winger Nene, PSG's top scorer last season with 21 goals, created the next goal in the 72nd, receiving a quick pass from Ibrahimovic and sending the ball perfectly into the path of Matuidi, who finished confidently.
Bastia staged a mini-comeback as PSG goalie Salvatore Sirigu made two good saves from Florian Thauvin and Toifilou Maoulida.
But the gulf between the teams was underlined by the fourth goal, when Nene picked out Ibrahimovic with a brilliant pass behind the defense for the Sweden striker to control the ball deftly, and then guide it through the legs of Novaes with assurance.
''When you play at the highest level you don't need many chances, and PSG have players like that,'' Bastia midfielder Jerome Rothen said.