The 2-0 reverse couple with Northampton's win at home to Burton Albion means the two sides are level on points ahead of a huge game at Adams Park over the Easter holidays.
Although Wanderers have a better goal difference, momentum appears to be with the Cobblers and Ainsworth was left to lament a second half performance in South Wales that left him 'flabbergasted'.
"It just wasn't good enough and we've given ourselves a real battle now with the game against Northampton on Friday."