After several rounds of negotiations, the Los Angeles Clippers and New York Knicks have abandoned discussions on a proposed trade centered on guard Iman Shumpert, league sources told Yahoo Sports.

The Knicks had interest in bringing back Clippers point guard Darren Collison and rookie Reggie Bullock as part of a package, but wanted Los Angeles to accept Raymond Felton in the deal, sources said. The Clippers resisted the Felton element of the deal, and were reluctant to part with Bullock or any draft picks in talks, sources said.

Clippers general manager and coach Doc Rivers has been determined to upgrade athleticism on the wings and see Shumpert as a player who can complement JJ Redick and Jared Dudley. Redick is expected to miss a month with a back injury.

Shortly after talks broke down, Shumpert had to leave the Knicks' game against the New Orleans Pelicans with a sprained left knee. He did not return to the game, and the severity of the injury was immediately unclear.