The Indian batsman will quit the sport after playing his 200th Test match for his country against the West Indies in Mumbai later this month.
"As a sportsman with a long active career as well, I think I can judge what it means to be around as many years as Sachin Tendulkar is, and I can only express my biggest respect for his achievements," the German wrote in an email to NDTV.
"We have met several times in Italy and India, and even if admittedly I was not - and still am not - very firm in the sport of cricket, I am fully aware of how many people around the world are.
"Having retired a bit earlier than him, I can also tell him that it is something he can look forward to. There is just so much to discover, as finally there is time to do so. I wish him all the best."
Schumacher presented Tendulkar with a Ferrari in 2002 for equalling Sir Donald Bradman's record of 29 Test hundreds.