Not really, if you're fielding, your job is to try catch the ball hit by the batsman to get them out, or to stop it from reaching the end of the field and then throw it back to the bowler or wicketkeeper at the wickets, or directly at the wickets to run them out. It's not that complicated, if you think you can reach the ball hit by the batsman you call for it and try catch or stop it.

It's the captain and the coaching staff that sets the positions of the fielders, now that is complicated strategy.