Madrid, Aug. 24 -- - FC Barcelona entertain Betis in the Camp Nou Stadium on Sunday needing to kick start their season and convince their supporters that they can challenge for this season's title after last weekend's defeat in Bilbao.

The week has again been dominated by rumors of Neymar Jr's possible return to Barca and on-field matters have largely been put to one side but failure to win on Sunday really would set the alarm bells ringing for Ernesto Valverde and company.

Leo Messi should be available after missing last weekend and much of pre-season with a calf injury, but it remains to be seen if Valverde will risk his star player from the start after just four days training with the rest of the squad.

However, with Luis Suarez and...