Cavs could veto trade with Boston without revisions to the original trade agreement?

The Cleveland Cavaliers are planning to seek an additional trade asset from the Celtics before finalizing the trade with the Boston Celtics.

Per ESPN, After Cleveland's physical examination of Isaiah Thomas' injured hip raised concern about the timeline for his return this season, Cavaliers officials are planning to seek an additional trade asset before finalizing a deal to send four-time All-Star guard Kyrie Irving to the Boston Celtics, league sources said.

Without revisions to the original trade agreement, the Cavaliers could threaten to veto the trade, league sources said.

Cleveland had coveted 2017 No. 3 overall draft pick Jayson Tatum, but Boston has consistently remained unwilling to include him into trade talks for Irving, league sources said.

Besides its own future first-round picks, Boston has possible access to future protected picks from the Los Angeles Lakers (2018), LA Clippers (2019) and Memphis Grizzlies (2019). Boston does have control of several second-round draft picks, too, which also could be included into a deal.