LONDON -- For the second time in about six months, a protégé and near doppelganger of retired German star Steffi Graf will try to prevent Serena Williams from claiming a place alongside Graf as the all-time Grand Slam singles champ with 22 titles.The hopeful spoiler in the Wimbledon final once again is 28-year-old No. 4 seed German Angelique Kerber, who plays Williams on Saturday at 9 a.m. ET on ESPN. Despite never having appeared in a Grand Slam final, Kerber foiled Williams attempt to equal Graf in Januarys Australian Open final.I made a lot of errors in that match, Williams said of the match in Melbourne. [Kerber] made little to no unforced errors. She played great. She came out swinging, ready to win. She was fearless. Thats something I learned. When I go into a final, I, too, need to be fearless like she was.Williams comment is juicy, composed of equal parts humility and warning. Call it a sequel -- and more. Its the fourth episode of The Hunt for Grafs Record and the second that features Williams and Kerber as co-stars.As much as players avoid words like grudge match, how could they not be operative? Melbourne was nothing less than an upset by a championship-match neophyte. Its time to even the score.Williams has prepared well. Shes played commanding, cant-touch-me tennis ever since Christina McHale gave her a scare in a three-set, second-round battle. But the familiar emotional outbursts and cries of desperation that marked Williams progress -- and flameouts -- in recent tournaments have yielded to quiet confidence like thunder and lightning giving way to refreshing, washed-out silence.Right now I feel like its pretty good, Williams said. I felt great in other tournaments as well. But I feel a little different. I just feel more relaxed and more at peace than I may have been in the past.Williams greatest assets are her monstrous serves and the blazing pace of her returns and groundstrokes. Williams crushed Elena Vesnina in the semifinal in under an hour. The beaten Russian spoke of Williams with awe afterward. She acknowledged she could do nothing with Williams overpowering serve but reminded the media that there was far more to the six-time champions game.Vesnina praised Williams variety of spins and said of her serve return: Its so fast, you cannot even finish your serve, then the balls already passing you with a clear winner.Kerber is feeling just as calm and centered as Williams. Serial slumps followed two or three good tournaments after her breakout. Shes restored her status here.I think that I should play my game, being aggressive, just going for it, trying to win the match, not hoping that, yeah, she will miss, Kerber said. She will not [be] missing the ball. She will go out there trying to winning. I think this for me will be very important to take the match in my hands.At 5-foot-7, Kerber is an inch shorter than Graf, who played an athletic game based on speed and a punishing forehand. Kerber is mobile with a low center of gravity and a far more versatile game. She can use her wrists as effectively as flippers on a pinball machine.The two great resources Kerber hopes to draw on with grass instead of cement underfoot are her mobility and her serve. Shes not a sprinter, but shes a great mover who gets to a lot of balls and plays low ones especially well. Grass also likes left-handers; the southpaw slice is a particularly tough serve for right-handers to handle on grass.When I have not too many nerves, I can serve a little bit better, Kerber said. This makes me much more dangerous than on hard.Note the caveat about nerves that Kerber attached to the comment about her serve. In Australia, she overcame a history of growing and throwing in puffball serves under pressure. If she can reproduce that performance and resist the jitters, Williams will have to call on all her resources in her quest for No. 22.I expect, for sure, a really tough match, Kerber said. I know that she will go out and try to beat me, especially because she lost against me in Australia. Surrey Storm will be seeking a repeat victory over Team Northumbria in Mondays match in the Vitality Netball Superleague, live on Sky Sports. The Storm claimed a convincing 57-35 win when the two teams met in the second week of the season, but Team Northumbria have shown encouraging signs in recent weeks.Manchester Thunder were made to work for a 65-51 victory over Team Northumbria on Saturday and Tearoha Keenans side have claimed wins over Loughborough Lightning and Yorkshire Jets. Pamela Cookey brings experience to the Surrey line-up Surrey responded well to their London Live loss to Hertfordshire Mavericks, claiming a 54-42 win over Team Bath at the weekend.Team Northumbrias veteran shooter Lynsey Armitage is expecting a closer encounter when the two teams meet again this week. Mikki Austin of the Surrey Storm joins Anna Woolhouse to run through one of her fitness routines They have played together for a long time.dddddddddddd. They are a tight team, Armitage told Sky Sports. There attack is very fluid and the defence are nice and strong.Since we played them a few weeks ago, weve come on as a team. Our confidence is building and were playing a lot better, so hopefully we can contest a lot harder against them.Watch Team Northumbria take on Surrey Storm, live on Sky Sports 2 from 7.30pm on Monday. Or watch for £6.99 without a contract, on NOW TV. Also See: Thunder back on top Vitality Superleague fixtures Table Live on Sky ' ' '