Novak Djokovic was surprisingly upbeat after his shock Indian Wells defeat at the hands of Botic van de Zandschlup - but his smile has left some onlookers concerned

Almost no one expected that Novak Djokovic's run at Indian Wells would end as early as the second round. It is true that the former world number 1 had never shone in California in recent years and was defeated by Luca Nardi in the last edition, but this time he seemed more ready and motivated to try to lift his sixth trophy here.

BNP Paribas Open at Indian Wells have had its few surprises, including early exits for Alexander Zverev and Novak Djokovic. Here's how the ATP Rankings could change this week.

Novak Djokovic was all smiles in his post-match press conference after a shock defeat at Indian Wells, but his reaction to the loss has raised suspicions over his mental state