Albian Ajeti's move to Celtic has stalled after the player asked for more time to weigh up his options.
The West Ham forward was due to undergo a medical with the Scottish champions on Wednesday, but he stayed in Switzerland to allow for more time to consider the switch.
The Scottish champions agreed a season-long loan deal with West Ham for Ajeti on Monday. The deal includes an option to buy, for a fee of around £5m.
Celtic have been interested in Ajeti since last summer, before he made an £8m move to West Ham from Basel.
A number of Premier League clubs, including West Brom, are also interested in the Swiss international - and the player is now mulling over what's best for his career at this stage.
The 23-year-old struggled to establish himself at West Ham last season and was limited to nine substitute appearances in the Premier League.
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The summer transfer window will run for 10 weeks from July 27 and close at 11pm on October 5. A domestic-only window for trades between the Premier League and EFL then runs from October 5 and closes on Friday October 16 at 5pm. Follow all the news and analysis on Sky Sports News and across Sky Sports' digital platforms.
