Palace got the better of Newcastle 2-1 away from home at St. James’ Park in the Premier League.
Jonjo Shelvey put the Magpies in the lead after just two minutes, only for Jairo Riedewald to restore parity for the Eagles in the 21st minute.
Gary Cahillmade it 2-1 to the London club just four minutes later, and it stayed 2-1 until the end.
Townsend, who had a spell at Newcastle in 2016, has revelled in the win for Palace on Instagram, and is relieved that his miss did not come back to haunt him.
Match Stats
Over the course of the 90 minutes at St. James Park on Tuesday evening, hosts Newcastle had 61% of the possession, took 21 shots of which five were on target, and earned nine corners.
Visitors Palace had 39% of the possession, took six shots of which three were on target, and earned one corner.