Pepe joined the Premier League side from Lille in the close season for a club-record fee that British media reported was around 72 million pounds , but the 24-year-old had managed only one goal in 11 appearances before Thursday.
"Every player needs that moment, that turning point ... to settle and hopefully now Arsenal can see what they paid for... 72 million pounds was seeming expensive until tonight," Keown told BT Sport. "I think, basically, he's kind of got that off his back now, that pressure, and he can release himself now and play."
"This is his day, this is his moment... I'm really happy for him. You can see what it does for him, even after the first freekick," Van Persie said.