51�Թ�

That idea has previously hit stumbling blocks over safety and trade rules.

The stumbling block of any prospective partnership has been Beijing's close-knit relationship with Moscow and its economic support for Russia.

New R&A chief executive Mark Darbon said in April he "would love" the course to host the tournament again, specifying that logistical issues pose the stumbling block, not who owns it.

For a US leader in a hurry to secure a peace deal, Crimea could become a big stumbling block.

After Miami, Raducanu wanted Petchey to lead the team on a more regular basis, but committing time around his television broadcasting work has been a stumbling block.