While Alonso’s usual competitors are contesting the prestigious Monaco grand prix this weekend, the Spaniard will be in Indianapolis preparing for the famous high speed oval race.
And Sainz, a Spaniard and friend of Alonso’s, said he will be keeping his eye on Alonso’s exploits.
“I watched qualifying and was not surprised how well he did. I knew he would,” the 22-year-old told the Spanish daily Marca.
“The race is another story, very long and with so much that can happen, but I’m sure he will also do well.
“I’m sure all of us formula one drivers in Monaco will be watching and encouraging him, hoping he does well and that he represents us well,” Sainz added.