The former West Ham midfielder feels the full-back deserves his end-of-season awards.
The full-back won the best signing, players' player and player of the year awards to cap a phenomenal campaign at Upton Park.
And Sinclair feels Cresswell's awards at West Ham's end-of-season ceremony were just reward for an 'excellent' season.
Meanwhile, Cresswell's team-mates piled on the praise on Twitter, with fellow defender James Tomkins lauding the full-back's exploits at Upton Park this term.
And winger Matt Jarvis also tweeted his congratulations to the 25-year-old, praising both the West Ham man's character and form.
Cresswell has undeniably been one of West Ham's biggest positives of the campaign and should be in for an even better season next term now that he is a settled top-flight defender - should he stay fit, of course.
Now to resolve the rest of the east London side's future. Starting with who will be in the dugout at the start of next season.
One of those responsible for that decision, David Gold, also gave his approval to Cresswell's award on Twitter: