Travis Kelce sends major warning to his Kansas City Chiefs team in the locker room after 49ers win

 warned his Chiefs team their winning start to the season will end next week if they approach the  Raiders game with the same mentality as last year.

The Raiders are the last team to have beaten the Chiefs,  last year.

The game went so badly for  City that Kelce on the sidelines in a furious outburst, with his team going on to lose 20-14. He also  during the game.

Next week in Vegas, the Chiefs will arrive with a winning 6-0 record but Kelce has told his team they have to avoid complacency.

‘I think we found out last year that if we don’t have the right mindset going into this game, this team can beat us,’ Kelce said in the locker room to Darren Smith, shortly after on Sunday.

Travis Kelce has told his Chiefs team they need to avoid a repeat of last season's Raiders game

Travis Kelce has told his Chiefs team they need to avoid a repeat of last season’s Raiders game

‘That’s every team in the NFL but this rivalry in the AFC West division, that’s always a big game – no matter who we are playing in the division. The Raiders, that is always a tough opponent.’

As for Sunday’s 28-18 win in San Francisco – which was a rematch of last season’s Super Bowl – Kelce praised the depth of the Chiefs roster. They had to overcome the early loss of JuJu Smith-Schuster, whose involvement was curtailed due to the hamstring issue that troubled him all last week.

‘It’s about us, it’s about us getting better throughout the year,’ Kelce said. ‘The message was to go out there and play together.

‘There are a lot of doubters with what we can do offensively right now with the guys that we’ve got. We showed everyone we can put up points today.

‘I love every single guy on this team. That’s our mentality – next guy up. Everybody feels their role, they want that opportunity to get out there and show the world that we’ve got everybody we need right here to win a championship.’

Speaking last year about his Raiders meltdown on New Heights, Kelce admitted his antics didn’t help the team.

‘He (coach Reid) is looking out for me and I love him for it,’ Kelce said. ‘I didn’t go back out there and play good. He wanted to see the fire in me and I reacted in a bad way.

The Chiefs are unbeaten on 6-0 after beating San Francisco 49ers on Sunday

The Chiefs are unbeaten on 6-0 after beating San Francisco 49ers on Sunday

Kelce lost his cool in the last game against the Raiders, a loss on Christmas Day

Kelce lost his cool in the last game against the Raiders, a loss on Christmas Day

‘He wanted the best out of me and right now I’m just not playing my best football.

‘I’ve got to f***ing lock the f*** in and be more accountable for him and more accountable for my teammates.’

It was a quieter game for Kelce on Sunday against the 49ers once again with four receptions for 17 yards.

Kareem Hunt, Patrick Mahomes and Mecole Hardman scored the touchdowns for the Chiefs.