Former India all-rounder Ravichandran Ashwin said it's a "laughable thing" that batters Rohit Sharma and Virat Kohli have to prove themselves. "What do they need to prove? Obviously, it's all messaging. In such long careers, we all have ups and downs," he added. Notably, Kohli and Rohit scored 302 and 146 runs, respectively, in the ODI series against South Africa.