Rafael Nadal says his start to the season would have been "impossible to imagine" three months ago, and he is planning to play a full clay-court season as well as Wimbledon.
The 21-time Grand Slam champion has won 18 consecutive matches and will face Nick Kyrgios in the quarter-finals at Indian Wells.
But he admits his long-term foot problem has caused pain in recent days.
The injury allowed him to play just one event in the second half of last year.
In an interview for BBC Sport after his fourth-round win over Reilly Opelka, Nadal said: "I just love playing here.