Hawk-Eye will be in use for most of the North American summer hard-court swing.
Denis Shapovalov has withdrawn from Roland Garros due to a shoulder injury.
The Greek star has high praise for the young Italian after their first meeting in Lyon.
The Swiss is not quite ready for prime time on the clay this spring.
World TeamTennis gets back to the Garden in November.
The fourth season of Laver Cup will operated at full capacity in Boston.
The Greek keeps putting up wins, but he's not satisfied as Roland-Garros looms.
