John Hartson faces a sleepless night before discovering whether he has become Martin O'Neill's second summer signing at Parkhead. Coventry striker Hartson flew into Edinburgh Airport yesterday and the 26-year-old quickly agreed personal terms before undergoing his medical. The Welsh international is with his agent Jonathan Barnett in Parkhead. Celtic have until today to tie up the deal in time for him to play in the third qualifying-round tie of the Champions League against Dutch giants Ajax.

Holland winger Boudewijn Zenden has left Barcelona's pre-season training camp in Switzerland and travelled to Brussels to negotiate a move away from the Nou Camp. Zenden, (24), has been a peripheral figure at Barcelona following his move from PSV Eindhoven in 1998. Chelsea are one of the clubs being linked to the player.

Newcastle were rewarded for their patience yesterday when they finally completed the signing of French striker Laurent Robert.

The 26-year-old Paris St Germain forward finalised his £10-million sterling move when he signed a five-year contract after passing a medical.

Stephane Mahe has left Celtic and signed a two-year deal with Hearts. He is expected to feature in Saturday's game against Aberdeen.

Robert Prosinecki has promised to entertain the Portsmouth fans following his surprise move to the first division club. The Croatian international, (32), was unveiled at Fratton Park yesterday after agreeing a one-year deal on the south coast.

Michael Ball may travel to Scotland if Everton and Rangers agree a fee that would take the England international to Ibrox.