Today’s tittle-tattle is walking on sunshine After waving Robert Lewandowski off into the sunset at the end of last season, Barcelona are in need of a new striker. The only one on their books scored the winner in the World Cup final. Julián Alvarez is at the centre of a Spanish tug of war this summer – he wants to leave Atlético Madrid and is wanted by Barcelona and Real Madrid , who had a £129m bid roundly rejected in June. With Atlético suits so far refusing to sit down with Joan Laporta for…