Manager Mark Sampson has told his England players to keep on improving despite their record 6-0 win over Scotland at the Women's European Championship.
England's six-goal victory in their opening game in Utrecht was the highest margin in the history of the tournament.
Jodie Taylor scored the first hat-trick at a European Championship for 20 years while Ellen White, Jordan Nobbs and substitute Toni Duggan all found the back of the net.
Sampson was thrilled with the performance but he said: "We know it's a work in progress. We're not the finished product yet. We're fighting to be the best we can.
"As I always say to the players, with every good performance they put it, it excites me even more about how far they can go."
He added: "It was always a matter of time before this team would get better. An exciting part is seeing how good they can become over the next hopefully five matches."
England, who slumped out of the last European Championship with just one point from three games, face Spain on Sunday and Sampson has a word of warning.
He said: "We know we'll have to produce a performance as good if not better. We've got our heads around Spain. We've got a difficult game on Sunday.
"Spain will be different to Scotland. They'll probably fall over a bit more so we need to be ready for that challenge."