UK stocks are set for a lower open on Tuesday as concerns about Greece continue to dampen investor sentiment.City sources predict the FTSE 100 will open 10 points lower than Monday's close of 7,029.85.Athens met the latest deadline to repay the International Monetary Fund €750m, though that didn't stop short-term Greek bond yields from surging on Monday. The yield on a Greek two-year bond yield jumped 83 basis points to 21.34%.As the Eurogroup met on Monday to discuss a cash-for-reform deal for Greece, finance minister Yanis Varoufakis warned that the Mediterranean nation is just two weeks away from running out of money. "The liquidity issue is a terribly urgent issue," Varoufakis told reporters in Brussels.A sell-off in bond markets elsewhere was also concerning investors as yields jumped on changing inflation expectations."Large amounts of Eurozone debt was yielding negative returns after the region fell into deflation territory and this had to reverse once we saw a rebound in oil prices," said Oanda analyst Craig Erlam.Stocks to watchBudget airline Easyjet met guidance after swinging to a small profit in the first half, though it faces tougher conditions in the latter part of the year. The company reported a £7m profit for the six months ended 31 March, compared with a £53m loss last year. Looking ahead however, exchange rate movements and air traffic control strikes in France are expected to hit second-half results.Experian finished a year of transition on a high as it returned to organic revenue growth in the fourth quarter, celebrating by paying a second interim dividend. For the full year, total revenue from continuing activities grew 1% to $4.81bn, with profit before tax slightly above flat at $751m and earnings per share up 1% at 76.9 cents.Hiscox saw gross premiums rise by 12% to £561.7m in the first quarter. Boss Bronek Masojada said the firm had an excellent start to the year thanks to a low number of claims numbers and favourable foreign exchange tailwinds. Political risks including unrest in Russia and Ukraine and falling oil prices were the one exception to the positive trend in claims. Rates in retail insurance where stable and margins there sustainable, but rates for larger insurance risks - such as big ticket US property business, aviation and offshore energy - where under pressure.