The 25-year-old made his debut in a 3-0 win over Brendan Rodgers' side, and says that they need to continue challenging the big sides and giving them a tough time.
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"But I prepared well both in terms of my mental and physical preparation in the days and weeks leading up to the game and I was very pleased the result was a positive one.
"I was fully aware of the history, prestige and reputation of Liverpool. But we also need to take into account that West Brom have a very good history.
"We shouldn't be afraid of playing teams like Liverpool. As the season goes on, we should confront the challenge of playing against teams that have a good history and remember that we also have a place in the Premier League."
The Argentine midfielder also stated how happy he is to have joined the club, and says he is finding his feet in England.
He added: "It's fantastic and I feel I have settled in really well."