Neymar has raised doubts about his Barcelona future, putting Manchester United on red alert. Elsewhere, Celtic are closing in on the signing of Manchester City midfielder Olivier Ntcham, while Manchester United have stepped up their pursuit of Real Madrid star James Rodriguez. Here's a complete report of the latest transfer updates Making The Rounds:

Neymar open to future move to Man United

Neymar signed a new five-year deal with Barcelona in October 2016, with a buy-out clause of $229million. But the Brazilian superstar has continued to be linked with Manchester United, who have the resources to launch a world record move for Neymar.

Earlier this year United boss José Mourinho said it would be “impossible” for his side to lure the striker away from Barcelona, with Mourinho insisting the Spanish giants won't be ready to entertain any bids. But, according to Goal, the 25-year-old Brazil international could be made available for possible transfer and, speaking in his homeland Brazil this week, Neymar refused to “guarantee” he'll still be at the Camp Nou next year.

When asked about his future, Neymar said: “Who knows tomorrow. I'm now pleased, very well satisfied. But anything can happen in the future, who knows?”

Olivier Ntcham set to join Celtic

Olivier Ntcham has been in Glasgow for talks over the weekend and is believed to be close to finalizing a deal.

The 21-year-old has been on loan at Genoa for the past two seasons, where he made thirty-seven league appearances for the Italian Serie A club. According to BBC, Ntcham is expected to finalize terms with the Scottish champions this week and immediately Join up for their preseason training.

Manchester United enter race to sign Rodriguez

According to Independent, Wayne Rooney's move to Everton FC has allowed Manchester United to intensify their interest in the Colombian striker. James Rodriguez has been heavily linked with Manchester United for the past eighteen months after struggling much to fully establish himself at Real Madrid since his arrival in 2014.

The Colombia international wants his future sorted “ideally” before the start of Real Madrid's preseason tour this week and may get his wish from Manchester United, who've already “splashed out” £75million to sign Romelu Lukaku. But they'll have to shell out another $79.8million if they wish to price James Rodriguez away from Real Madrid.

It has been suggested that the “breakdown” in negotiations for striker Alvaro Morata shouldn't affect the discussions regarding James Rodriguez possible move to Manchester United this summer.