Is there a single word that could describe the phrase "makes it look easy"?
"Roger Federer plays tennis effortlessly".
It is shorter, but "makes it looks easy" is better writing, IMHO. Brevity is not ALWAYS the soul of wit.
In addition to the other answers which have discussed your specific example, if you want to generalize a task is easy for someone expert at it, the popular phrases are
That was a "piece of cake" for him
That was "easy as pie" for him
and a single word,
That was a "cakewalk" for him
Examples from the link above -
"winning the tournament was a cakewalk for him"; "invading Iraq won't be a cakewalk"