New Delhi, April 23 -- The markets are expected to see a muted opening on Tuesday as trends on SGX Nifty indicate. Indian benchmark indices Sensex and Nifty saw 2019's sharpest decline yesterday. Investors will keenly watch out crude oil prices after it jumped around 3% the previous day to a near six-month high, on growing concern about tight global supplies after the United States announced a further clampdown on Iranian oil exports....