After three races in which driver and the team have struggled to unlock performance from tyres and vehicle, Mercedes finally had the platform required at the Circuit de Catalunya. "I just need to continue my development, there are never things that you can't learn more", he added.
ESPN takes a look at some of the best and quirkiest stats to come out of the Spanish Grand Prix.
Hamilton's win on Sunday was the 21st time in 28 races the polesitter has won at the Circuit de Catalunya. McLaren was third-fastest with young reserve driver Lando Norris. His lap would have secured 11th place on Sunday's grid, faster than regular driver Stoffel Vandoorne and 0.3s off Fernando Alonso's best effort on the super-soft in Q3. They blistered very seriously and could have caused serious problems.
Testing in northeastern Spain concludes on Wednesday.
"There's definitely some differences", Norris said.
"The day didn't quite go according to our plan, Valtteri lost a place to Vettel off the line and whilst he had good pace, it's very hard to overtake here and on tyres of the same age we couldn't get close to a passing position", Shovlin explained.
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"I think it's pretty straightforward", Vettel said.
"I'm looking forward to Monaco; hopefully we can take some of the things we've learned onto there". However, Hamilton's pace in that opening stint was absolutely mighty.
It is a race where the pole-sitter often wins - it has happened on 20 of the previous 27 occasions - and, fresh from his victory in Azerbaijan, the Mercedes driver will be confident of maximum points again.
Charles Leclerc of Sauber and Sergio Perez of Force India closed out the top 10. His day at the wheel of the FW41 ended with 123 laps on the board as the team looked to better understand the issues it has faced with its vehicle since the start of the year. "Today was a great reward for everyone's effort". I felt that synergy which I hadn't been feeling for the whole year.
Many teams used junior drivers, defined as a driver who has completed two or fewer races, as required by F1 regulations for in-season testing. "We had problems finding the right balance of the auto and we were struggling with the front tires".
Another new name on the timing screens was Jake Dennis, with the Red Bull simulator driver getting a full day behind the wheel of the RB14. "Race by race we're understanding the tyres more, which is a bit battle for everyone".