The Hammers threw off the shackles and went for it at the London Stadium on Saturday in an attacking system that showcased their quality without exposing the defence.
Goalscorer Antonio said: “You have got to go out there and have a go, score goals, create goals and defend and work as a team. We had 11 men out there chasing, working hard and showing what we can do.
“We believe that we will be all right and we have always believed that. We have never really worried about it. In the situation we are in, it has just been individual mistakes. When we keep the individual mistakes out, we perform.
“The key was keeping the tempo high, finishing opportunities that we had, pressing and basically just playing free.
“The last three weeks we have been playing under pressure but after the performance that we had at Liverpool on Monday, we realised that we can play and had the confidence to do it."