Roberto Di Matteo hailed the progress West Bromwich Albion have made in a short space of time following Saturday's 3-2 victory over Arsenal.
The Baggies were given a footballing lesson in a 6-0 mailing by Chelsea on their return to the Premier League last month.
However, they have improved since their opening day horror show and Di Matteo claimed they fully deserved their surprise victory at the Emirates Stadium.
Peter Odemwingie, Gonzalo Jara and Jerome Thomas fired the visitors into a three-goal lead before the Gunners reduced the deficit in stoppage time.
"We got a hammering at Chelsea and it wasn't a pretty week after that, but we've learned," said Di Matteo.
"We've cut out those mistakes and that gives us a chance to stay in a game and win things.
"We go into games believing we can win. It was the way we won, we were not lucky. We played some tremendous football and defended well too.
"I would say we deserved it, the way we played, the way we created chances, scored goals and played very well.
"We pressed them very high, we pressed them all over the pitch. We managed not to let them play their usual way and, when we had the ball, we passed it very well and created chances ourselves."