By Carla Mozee, MarketWatch

U.K. stocks eked out a small gain Thursday as some retailers advanced following financial updates, but the rise was blunted in part as significant progress in resolving Greece's debt crisis failed to materialize.

The FTSE 100 finished up 0.1% at 7,040.92. The benchmark for much of the session fell with other European stock markets after key European officials late Wednesday rebuffed comments by Greece's Prime Minister Alexis Tsipras suggesting Athens was getting close to a deal with international creditors.

U.K. and European stocks had rallied on Wednesday on the prospect that a deal was in the works. European stocks finished lower on Thursday.

Concerns about Greece's cash crunch and its future in the eurozone have hit sentiment across European markets as well as those in the U.K., which although it isn't part of the eurozone, is part of the European Union.

With most regional markets "ending the day in the red, it looks like people are still preferring to believe the eurozone and Greece's creditors, rather than the government in Athens," wrote Chris Beauchamp, senior market analyst at IG, in a note.

Outside of Greek worries, Beauchamp noted the FTSE 100 felt the weight of a 4.6% loss in shares of equipment rental company Ashtead Group PLC . The shares dropped after U.S. counterpart United Rentals Inc. (URI) acknowledged at a conference that activity in May "is coming in a little softer" than it had anticipated.

Ashtead's success "has been built on the strength of its U.S. operations," said Beauchamp, "and while the news does not dent the upward trend, it will cause some investors to wonder whether the shares are still compelling value at around 20 times earnings."

But topping the FTSE 100 was Sports Direct International PLC . The stock climbed 4.2% as the retailer said underlying pretax profit and per-share earnings for the year ended April 26 are ahead of market expectations (http://www.marketwatch.com/story/sports-direct-sees-yearly-figures-above-estimates-2015-05-28).

Kingfisher PLC shares tacked on 2.2% after the home-improvement retailer reported a 0.8% rise in first-quarter same-store sales (http://www.marketwatch.com/story/kingfisher-posts-rise-in-same-store-sales-2015-05-28), with retail profit in constant currencies up 1.4% at 150 million pounds ($230 million).

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